diff --git a/crates/app/src/shot.rs b/crates/app/src/shot.rs
index 8e4f29a..074cebc 100644
--- a/crates/app/src/shot.rs
+++ b/crates/app/src/shot.rs
@@ -13,7 +13,7 @@
 //! restrict the run to a single palette. Captures land at
 //! `<PLOTX_SHOT>/<theme>/<scene>.png`.
 
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 
@@ -31,6 +31,7 @@ use plotx_io::xps::{
 };
 use plotx_io::{AxisSource, Dim, Domain, NmrData, NmrData2D, PseudoAxis, PseudoKind, QuadMode};
 
+mod capture;
 mod craft_shot;
 
 const FIT_LO: f64 = 1.4;
@@ -88,6 +89,7 @@ enum Op {
     RegionResult,
     /// Open the result's synchronized read-only values.
     RegionData,
+    History(bool),
     XpsSetup,
     CraftSetup,
     XpsTab(plotx_core::state::XpsWorkbenchTab),
@@ -136,6 +138,9 @@ const SCENES: &[Scene] = &[
     act(2, Op::Zoom(0.75)),
     act(2, Op::Setup),
     shot(8, "band"),
+    act(2, Op::History(true)),
+    shot(8, "operation_history"),
+    act(2, Op::History(false)),
     act(2, Op::LineFit),
     shot(10, "fitted"),
     // The three widths bracket the Ribbon's width budget: 720 steps the
@@ -331,7 +336,7 @@ impl ShotDriver {
                 .collect()
         });
         for (rel, image) in shots {
-            if let Err(error) = save_png(&self.dir.join(format!("{rel}.png")), &image) {
+            if let Err(error) = capture::save_png(&self.dir.join(format!("{rel}.png")), &image) {
                 self.fail(app, ctx, format!("failed to save {rel}: {error}"));
                 return;
             }
@@ -373,6 +378,12 @@ fn run_op(op: Op, app: &mut PlotxApp, ctx: &egui::Context) -> Result<(), String>
         Op::DeltaCursor => delta_cursor(app)?,
         Op::PinSymmetry => pin_symmetry(app)?,
         Op::RegionResult => region_result(app),
+        Op::History(open) => {
+            app.session.ui.diagnostics_open = open;
+            ctx.data_mut(|data| {
+                data.insert_temp(egui::Id::new("operation_history_messages_tab"), true)
+            });
+        }
         Op::RegionData => {
             app.session.ui.sheet_open = Some(1);
             app.session.ui.curve_fit_task_collapsed = true;
@@ -754,43 +765,6 @@ fn synthetic_cosy() -> plotx_io::NmrData2D {
     }
 }
 
-fn save_png(path: &Path, image: &egui::ColorImage) -> Result<(), String> {
-    if let Some(parent) = path.parent() {
-        std::fs::create_dir_all(parent)
-            .map_err(|error| format!("create {}: {error}", parent.display()))?;
-    }
-    let [width, height] = image.size;
-    // egui screenshots are opaque RGBA8, so straight-alpha encoding is exact.
-    image::save_buffer_with_format(
-        path,
-        image.as_raw(),
-        width as u32,
-        height as u32,
-        image::ColorType::Rgba8,
-        image::ImageFormat::Png,
-    )
-    .map_err(|error| format!("encode {}: {error}", path.display()))
-}
-
 #[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn automated_exit_bypasses_dirty_project_prompt() {
-        let mut app = PlotxApp::new_with_settings(plotx_core::settings::Settings::default());
-        app.mark_document_dirty();
-        let ctx = egui::Context::default();
-
-        let output = ctx.run_ui(egui::RawInput::default(), |ui| {
-            request_exit(&mut app, ui.ctx());
-        });
-
-        assert!(app.session.allow_close);
-        let root = output
-            .viewport_output
-            .get(&egui::ViewportId::ROOT)
-            .expect("root viewport output");
-        assert!(root.commands.contains(&egui::ViewportCommand::Close));
-    }
-}
+#[path = "shot/tests.rs"]
+mod tests;
diff --git a/crates/app/src/shot/capture.rs b/crates/app/src/shot/capture.rs
new file mode 100644
index 0000000..c74404c
--- /dev/null
+++ b/crates/app/src/shot/capture.rs
@@ -0,0 +1,19 @@
+use std::path::Path;
+
+pub(super) fn save_png(path: &Path, image: &egui::ColorImage) -> Result<(), String> {
+    if let Some(parent) = path.parent() {
+        std::fs::create_dir_all(parent)
+            .map_err(|error| format!("create {}: {error}", parent.display()))?;
+    }
+    let [width, height] = image.size;
+    // egui screenshots are opaque RGBA8, so straight-alpha encoding is exact.
+    image::save_buffer_with_format(
+        path,
+        image.as_raw(),
+        width as u32,
+        height as u32,
+        image::ColorType::Rgba8,
+        image::ImageFormat::Png,
+    )
+    .map_err(|error| format!("encode {}: {error}", path.display()))
+}
diff --git a/crates/app/src/shot/tests.rs b/crates/app/src/shot/tests.rs
new file mode 100644
index 0000000..7cde2dd
--- /dev/null
+++ b/crates/app/src/shot/tests.rs
@@ -0,0 +1,19 @@
+use super::*;
+
+#[test]
+fn automated_exit_bypasses_dirty_project_prompt() {
+    let mut app = PlotxApp::new_with_settings(plotx_core::settings::Settings::default());
+    app.mark_document_dirty();
+    let ctx = egui::Context::default();
+
+    let output = ctx.run_ui(egui::RawInput::default(), |ui| {
+        request_exit(&mut app, ui.ctx());
+    });
+
+    assert!(app.session.allow_close);
+    let root = output
+        .viewport_output
+        .get(&egui::ViewportId::ROOT)
+        .expect("root viewport output");
+    assert!(root.commands.contains(&egui::ViewportCommand::Close));
+}
diff --git a/crates/app/src/ui/activity.rs b/crates/app/src/ui/activity.rs
new file mode 100644
index 0000000..4ef2196
--- /dev/null
+++ b/crates/app/src/ui/activity.rs
@@ -0,0 +1,90 @@
+use egui::Ui;
+use egui_phosphor::regular as icon;
+use plotx_core::state::PlotxApp;
+
+use super::clipboard_table::ClipboardTablePaste;
+use super::commands::{self, CommandId};
+
+pub(super) fn messages_tab_id() -> egui::Id {
+    egui::Id::new("operation_history_messages_tab")
+}
+
+pub(super) fn observe(app: &mut PlotxApp) {
+    app.session.status_history.observe(&app.session.status);
+}
+
+pub(crate) fn open_diagnostics(app: &mut PlotxApp, ctx: &egui::Context) {
+    app.session.ui.diagnostics_open = true;
+    ctx.data_mut(|data| data.insert_temp(messages_tab_id(), false));
+}
+
+pub(super) fn history_button(app: &mut PlotxApp, clipboard: &mut ClipboardTablePaste, ui: &mut Ui) {
+    let response = ui
+        .add_sized(
+            [
+                super::ribbon_chrome::SIDEBAR_TOGGLE_WIDTH,
+                ui.spacing().interact_size.y,
+            ],
+            egui::Button::new(icon::CLOCK_COUNTER_CLOCKWISE)
+                .frame_when_inactive(false)
+                .selected(app.session.ui.diagnostics_open),
+        )
+        .on_hover_text(format!("Operation history\n{}", app.session.status));
+    if super::pending_feedback(app).is_some() {
+        ui.painter().circle_filled(
+            response.rect.right_top() + egui::vec2(-5.0, 5.0),
+            2.5,
+            ui.visuals().warn_fg_color,
+        );
+    }
+    if response.clicked() {
+        commands::execute(CommandId::OperationHistory, app, clipboard, ui.ctx());
+        ui.ctx()
+            .data_mut(|data| data.insert_temp(messages_tab_id(), true));
+    }
+}
+
+pub(super) fn messages(app: &PlotxApp, ui: &mut Ui) {
+    let count = app.session.status_history.messages().len();
+    ui.vertical(|ui| {
+        if count == 0 {
+            ui.weak("No messages yet. Open data to begin.");
+        }
+        for message in app.session.status_history.messages().rev() {
+            let elapsed = message.recorded_at.elapsed().unwrap_or_default().as_secs();
+            ui.horizontal_top(|ui| {
+                ui.add_sized(
+                    [56.0, ui.spacing().interact_size.y],
+                    egui::Label::new(
+                        crate::typography::caption(format!(
+                            "{}:{:02} ago",
+                            elapsed / 60,
+                            elapsed % 60
+                        ))
+                        .color(ui.visuals().weak_text_color()),
+                    ),
+                );
+                ui.add(egui::Label::new(&message.text).wrap().selectable(true));
+            });
+            ui.separator();
+        }
+    });
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn diagnostic_links_reveal_details_after_browsing_messages() {
+        let ctx = egui::Context::default();
+        let mut app = PlotxApp::new_with_settings(plotx_core::settings::Settings::default());
+        ctx.data_mut(|data| data.insert_temp(messages_tab_id(), true));
+        open_diagnostics(&mut app, &ctx);
+        assert!(app.session.ui.diagnostics_open);
+        assert_eq!(
+            ctx.data(|data| data.get_temp::<bool>(messages_tab_id())),
+            Some(false)
+        );
+    }
+}
diff --git a/crates/app/src/ui/command_exec.rs b/crates/app/src/ui/command_exec.rs
index 3c96c63..7931ba5 100644
--- a/crates/app/src/ui/command_exec.rs
+++ b/crates/app/src/ui/command_exec.rs
@@ -164,7 +164,7 @@ fn execute_inner(
             app.session.updates.check_now();
             app.open_settings();
         }
-        CommandId::OperationHistory => app.session.ui.diagnostics_open = true,
+        CommandId::OperationHistory => super::activity::open_diagnostics(app, ctx),
         CommandId::About => app.session.ui.about_open = true,
         CommandId::SaveProcessingTemplate | CommandId::ApplyProcessingTemplate => {
             if let Some(dataset) = app.active_dataset() {
diff --git a/crates/app/src/ui/diagnostics.rs b/crates/app/src/ui/diagnostics.rs
index 89bbf88..c95ef51 100644
--- a/crates/app/src/ui/diagnostics.rs
+++ b/crates/app/src/ui/diagnostics.rs
@@ -4,9 +4,12 @@ pub(super) fn diagnostic_history_window(app: &mut PlotxApp, ctx: &egui::Context)
     if !app.session.ui.diagnostics_open {
         return;
     }
+    super::activity::observe(app);
 
     let mut open = true;
     let mut clear = false;
+    let tab_id = super::activity::messages_tab_id();
+    let mut messages_tab = ctx.data(|data| data.get_temp::<bool>(tab_id).unwrap_or(false));
     let copied_text = app.session.sanitized_diagnostics_text();
     let window = egui::Window::new("Operation history")
         .default_width(620.0)
@@ -41,44 +44,60 @@ pub(super) fn diagnostic_history_window(app: &mut PlotxApp, ctx: &egui::Context)
             });
         });
         ui.separator();
-        egui::ScrollArea::vertical().show(ui, |ui| {
-            let mut any = false;
-            for operation in app.session.operation_history.operations().rev() {
-                any = true;
-                ui.group(|ui| {
-                    ui.horizontal_wrapped(|ui| {
-                        ui.label(crate::typography::headline(format!(
-                            "#{} {}",
-                            operation.id,
-                            operation.kind.as_str()
-                        )));
-                        ui.label(operation.outcome.as_str());
-                    });
-                    ui.label(&operation.summary);
-                    for diagnostic in &operation.diagnostics {
+        ui.add(egui::Label::new(crate::typography::callout(&app.session.status)).wrap());
+        if let Some(di) = app.active_dataset() {
+            ui.weak(app.doc.datasets[di].summary());
+        }
+        ui.horizontal(|ui| {
+            ui.selectable_value(&mut messages_tab, true, "Messages");
+            ui.selectable_value(&mut messages_tab, false, "Diagnostics");
+        });
+        ui.separator();
+        egui::ScrollArea::vertical()
+            .id_salt(("history", messages_tab))
+            .show(ui, |ui| {
+                if messages_tab {
+                    super::activity::messages(app, ui);
+                    return;
+                }
+                let mut any = false;
+                for operation in app.session.operation_history.operations().rev() {
+                    any = true;
+                    ui.group(|ui| {
                         ui.horizontal_wrapped(|ui| {
                             ui.label(crate::typography::headline(format!(
-                                "{} {}",
-                                diagnostic.severity.as_str(),
-                                diagnostic.code.as_str()
+                                "#{} {}",
+                                operation.id,
+                                operation.kind.as_str()
                             )));
-                            ui.label(&diagnostic.message);
+                            ui.label(operation.outcome.as_str());
                         });
-                        if let Some(source) = &diagnostic.source {
-                            ui.weak(format!("source: {source}"));
-                        }
-                        for (key, value) in &diagnostic.context {
-                            ui.weak(format!("{key}: {value}"));
+                        ui.label(&operation.summary);
+                        for diagnostic in &operation.diagnostics {
+                            ui.horizontal_wrapped(|ui| {
+                                ui.label(crate::typography::headline(format!(
+                                    "{} {}",
+                                    diagnostic.severity.as_str(),
+                                    diagnostic.code.as_str()
+                                )));
+                                ui.label(&diagnostic.message);
+                            });
+                            if let Some(source) = &diagnostic.source {
+                                ui.weak(format!("source: {source}"));
+                            }
+                            for (key, value) in &diagnostic.context {
+                                ui.weak(format!("{key}: {value}"));
+                            }
                         }
-                    }
-                });
-                ui.add_space(6.0);
-            }
-            if !any {
-                ui.weak("No structured operations have been recorded yet.");
-            }
-        });
+                    });
+                    ui.add_space(6.0);
+                }
+                if !any {
+                    ui.weak("No structured operations have been recorded yet.");
+                }
+            });
     });
+    ctx.data_mut(|data| data.insert_temp(tab_id, messages_tab));
 
     if clear {
         app.session.clear_operation_history();
diff --git a/crates/app/src/ui/mod.rs b/crates/app/src/ui/mod.rs
index e47e927..4d0fbf2 100644
--- a/crates/app/src/ui/mod.rs
+++ b/crates/app/src/ui/mod.rs
@@ -1,3 +1,4 @@
+mod activity;
 pub(crate) mod affordance;
 pub(crate) mod align;
 pub(crate) mod arithmetic;
@@ -149,7 +150,7 @@ pub fn render(
         });
 
     feedback_banner(app, ui, dark);
-    render_status(app, ui, dark);
+    activity::observe(app);
 
     let workspace_width = ui.available_width();
     sidebars::render(app, ui, dark, workspace_width);
@@ -214,6 +215,7 @@ pub fn render(
     let now = ctx.input(|i| i.time);
     app.finish_pending_wheel_zoom(now, false);
     app.finish_pending_wheel_property(now, false);
+    activity::observe(app);
 }
 
 fn project_window_title(app: &PlotxApp) -> String {
@@ -243,45 +245,6 @@ fn copy_table_export(ctx: &egui::Context, payload: plotx_core::data_export::Clip
     ctx.copy_text(payload.text);
 }
 
-fn render_status(app: &PlotxApp, ui: &mut Ui, dark: bool) {
-    if !app.settings.appearance.show_status_bar {
-        return;
-    }
-    egui::Panel::bottom("status")
-        .frame(
-            card_frame(
-                dark,
-                egui::Margin {
-                    left: 8,
-                    right: 8,
-                    top: 4,
-                    bottom: 8,
-                },
-            )
-            .inner_margin(egui::Margin::symmetric(10, 4)),
-        )
-        .show_separator_line(false)
-        .show_inside(ui, |ui| {
-            ui.horizontal(|ui| {
-                let show_summary = ui.available_width() > 460.0;
-                ui.add(
-                    egui::Label::new(crate::typography::callout(&app.session.status))
-                        .truncate()
-                        .sense(Sense::hover()),
-                )
-                .on_hover_text(&app.session.status);
-                if show_summary && let Some(di) = app.active_dataset() {
-                    ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
-                        ui.label(
-                            crate::typography::callout(app.doc.datasets[di].summary())
-                                .color(ui.visuals().weak_text_color()),
-                        );
-                    });
-                }
-            });
-        });
-}
-
 /// The newest *unacknowledged* warning/failure plus how many older ones are
 /// still pending. Selecting by outcome — not recency of the whole history —
 /// means a success landing right after a failure (the second file of a batch,
@@ -374,7 +337,7 @@ fn feedback_banner(app: &mut PlotxApp, ui: &mut Ui, dark: bool) {
                             app.session.ui.dismissed_feedback_order = Some(completion_order);
                         }
                         if ui.button("Details").clicked() {
-                            app.session.ui.diagnostics_open = true;
+                            activity::open_diagnostics(app, ui.ctx());
                         }
                     },
                 );
@@ -623,37 +586,6 @@ fn flush_frame(dark: bool, inner_margin: egui::Margin) -> egui::Frame {
 #[path = "sidebar_tests.rs"]
 mod sidebar_tests;
 
-#[cfg(test)]
-mod status_bar_tests {
-    use super::*;
-    use egui::{Pos2, RawInput, Rect, vec2};
-
-    fn remaining_height(app: &PlotxApp) -> f32 {
-        let ctx = crate::typography::test_context();
-        let input = RawInput {
-            screen_rect: Some(Rect::from_min_size(Pos2::ZERO, vec2(800.0, 600.0))),
-            ..Default::default()
-        };
-        let mut height = 0.0;
-        let _ = ctx.run_ui(input, |ui| {
-            render_status(app, ui, false);
-            height = ui.available_height();
-        });
-        height
-    }
-
-    #[test]
-    fn status_bar_only_reserves_workspace_when_enabled() {
-        let mut app = PlotxApp::new_with_settings(plotx_core::settings::Settings::default());
-        let hidden_height = remaining_height(&app);
-
-        app.settings.appearance.show_status_bar = true;
-        let shown_height = remaining_height(&app);
-
-        assert!(shown_height < hidden_height);
-    }
-}
-
 #[cfg(test)]
 mod feedback_tests {
     use super::*;
diff --git a/crates/app/src/ui/properties/mod.rs b/crates/app/src/ui/properties/mod.rs
index 74af151..acb028f 100644
--- a/crates/app/src/ui/properties/mod.rs
+++ b/crates/app/src/ui/properties/mod.rs
@@ -644,12 +644,6 @@ pub const PRESENTATIONS: &[PropertyPresentation] = &[
         &[LocalizedText("appearance theme")],
         APPEARANCE_PREFERENCES_HOME,
     ),
-    preference_entry(
-        app_preferences::SHOW_STATUS_BAR,
-        "Show status bar",
-        &[LocalizedText("bottom status")],
-        APPEARANCE_PREFERENCES_HOME,
-    ),
     preference_entry(
         app_preferences::GRAPHICS_POWER,
         "Graphics processor",
diff --git a/crates/app/src/ui/properties/tests.rs b/crates/app/src/ui/properties/tests.rs
index 0dcabe3..f87b0b8 100644
--- a/crates/app/src/ui/properties/tests.rs
+++ b/crates/app/src/ui/properties/tests.rs
@@ -319,8 +319,8 @@ fn migrated_preferences_keep_their_real_section_density() {
         ),
         (
             SettingsCategory::Appearance.section_id(),
-            4,
-            "theme, status bar, GPU, and the accent override row",
+            3,
+            "theme, GPU, and the accent override row",
         ),
         (
             SettingsCategory::Processing.section_id(),
diff --git a/crates/app/src/ui/ribbon.rs b/crates/app/src/ui/ribbon.rs
index 9116ecd..7035224 100644
--- a/crates/app/src/ui/ribbon.rs
+++ b/crates/app/src/ui/ribbon.rs
@@ -197,6 +197,7 @@ fn render_chrome_controls(
         app.session.ui.ribbon_expanded = !app.session.ui.ribbon_expanded;
     }
     update_button(app, ui, compact_controls);
+    super::activity::history_button(app, clipboard, ui);
     let palette = commands::describe(app, CommandId::CommandPalette);
     let search_label = if compact_controls {
         icon::MAGNIFYING_GLASS.to_owned()
diff --git a/crates/app/src/ui/ribbon_chrome.rs b/crates/app/src/ui/ribbon_chrome.rs
index 4539820..0db873d 100644
--- a/crates/app/src/ui/ribbon_chrome.rs
+++ b/crates/app/src/ui/ribbon_chrome.rs
@@ -145,6 +145,8 @@ fn controls_width(app: &PlotxApp, ui: &Ui, compact: bool) -> f32 {
         + 2.0 * SIDEBAR_TOGGLE_WIDTH
         + 6.0
         + 5.0 * spacing
+        // The history button and its gap.
+        + SIDEBAR_TOGGLE_WIDTH + CONTROL_SPACING
 }
 
 /// Fixed width of one sidebar layout toggle; shared with the width estimate
diff --git a/crates/app/src/ui/windows/project.rs b/crates/app/src/ui/windows/project.rs
index 9f8d3f5..ce881c8 100644
--- a/crates/app/src/ui/windows/project.rs
+++ b/crates/app/src/ui/windows/project.rs
@@ -17,7 +17,7 @@ pub(in crate::ui) fn save_project_window(app: &mut PlotxApp, ctx: &egui::Context
         if app.session.status.starts_with("Save failed:") {
             ui.colored_label(ui.visuals().error_fg_color, &app.session.status);
             if ui.link("Open diagnostic details").clicked() {
-                app.session.ui.diagnostics_open = true;
+                crate::ui::activity::open_diagnostics(app, ui.ctx());
             }
             ui.add_space(8.0);
         }
@@ -145,7 +145,7 @@ fn project_transition_dialog(app: &mut PlotxApp, ctx: &egui::Context, saving: bo
                     .show(ui, |ui| {
                         ui.colored_label(ui.visuals().error_fg_color, &app.session.status);
                         if ui.link("Open diagnostic details").clicked() {
-                            app.session.ui.diagnostics_open = true;
+                            crate::ui::activity::open_diagnostics(app, ui.ctx());
                         }
                     });
             }
diff --git a/crates/core/src/properties/app_preferences.rs b/crates/core/src/properties/app_preferences.rs
index 89da461..043c962 100644
--- a/crates/core/src/properties/app_preferences.rs
+++ b/crates/core/src/properties/app_preferences.rs
@@ -21,7 +21,6 @@ pub const KEEP_EMPTY_SOURCE_CANVAS: PropertyId =
 pub const PROJECT_BACKUP_GENERATIONS: PropertyId =
     PropertyId("settings.general.project_backup_generations");
 pub const THEME: PropertyId = PropertyId("settings.appearance.theme");
-pub const SHOW_STATUS_BAR: PropertyId = PropertyId("settings.appearance.show_status_bar");
 pub const GRAPHICS_POWER: PropertyId = PropertyId("settings.appearance.graphics_power");
 pub const ACCENT_COLOR: PropertyId = PropertyId("settings.appearance.accent.color");
 pub const INCLUDE_VIEW_SNAPSHOTS: PropertyId = PropertyId("settings.export.include_view_snapshots");
@@ -146,13 +145,6 @@ pub(crate) const DEFINITIONS: &[PropertyDefinition] = &[
         "Chrome theme",
         &["appearance theme", "light mode", "dark mode"],
     ),
-    app_definition(
-        SHOW_STATUS_BAR,
-        ValueSchema::Bool,
-        DefaultPolicy::Fixed(PropertyValue::Bool(false)),
-        "Show status bar",
-        &["status bar", "bottom status"],
-    ),
     app_definition(
         GRAPHICS_POWER,
         ValueSchema::Enum {
@@ -324,7 +316,6 @@ fn value_of(app: &PlotxApp, id: PropertyId) -> Result<PropertyValue, PropertyErr
             PropertyValue::Int(i64::from(settings.general.project_backup_generations))
         }
         THEME => PropertyValue::Enum(theme_key(settings.appearance.theme)),
-        SHOW_STATUS_BAR => PropertyValue::Bool(settings.appearance.show_status_bar),
         GRAPHICS_POWER => PropertyValue::Enum(graphics_key(settings.appearance.graphics_power)),
         ACCENT_COLOR => {
             let [r, g, b] = settings.appearance.canvas_accent.unwrap_or([
@@ -399,9 +390,6 @@ fn write_value(
         (THEME, PropertyValue::Enum(value)) => {
             settings.appearance.theme = theme(value).expect("validated theme")
         }
-        (SHOW_STATUS_BAR, PropertyValue::Bool(value)) => {
-            settings.appearance.show_status_bar = value
-        }
         (GRAPHICS_POWER, PropertyValue::Enum(value)) => {
             settings.appearance.graphics_power = graphics(value).expect("validated graphics power")
         }
diff --git a/crates/core/src/properties/app_preferences_tests.rs b/crates/core/src/properties/app_preferences_tests.rs
index c0b461b..46b7b88 100644
--- a/crates/core/src/properties/app_preferences_tests.rs
+++ b/crates/core/src/properties/app_preferences_tests.rs
@@ -133,7 +133,6 @@ fn all_thirteen_app_preferences_reset_through_their_catalog_definitions() {
     settings.general.keep_empty_source_canvas = true;
     settings.general.project_backup_generations = MAX_PROJECT_BACKUP_GENERATIONS;
     settings.appearance.theme = ThemeMode::Dark;
-    settings.appearance.show_status_bar = true;
     settings.appearance.graphics_power = GraphicsPowerPreference::HighPerformance;
     settings.appearance.canvas_accent = Some([12, 34, 56]);
     settings.export.include_view_snapshots = true;
@@ -149,7 +148,6 @@ fn all_thirteen_app_preferences_reset_through_their_catalog_definitions() {
         KEEP_EMPTY_SOURCE_CANVAS,
         PROJECT_BACKUP_GENERATIONS,
         THEME,
-        SHOW_STATUS_BAR,
         GRAPHICS_POWER,
         ACCENT_COLOR,
         INCLUDE_VIEW_SNAPSHOTS,
@@ -172,10 +170,6 @@ fn all_thirteen_app_preferences_reset_through_their_catalog_definitions() {
     let defaults = Settings::default();
     assert_eq!(app.settings.general, defaults.general);
     assert_eq!(app.settings.appearance.theme, defaults.appearance.theme);
-    assert_eq!(
-        app.settings.appearance.show_status_bar,
-        defaults.appearance.show_status_bar
-    );
     assert_eq!(
         app.settings.appearance.graphics_power,
         defaults.appearance.graphics_power
diff --git a/crates/core/src/settings/model.rs b/crates/core/src/settings/model.rs
index 4345d3a..d4754f3 100644
--- a/crates/core/src/settings/model.rs
+++ b/crates/core/src/settings/model.rs
@@ -87,8 +87,6 @@ pub struct AppearanceSettings {
     #[serde(default)]
     pub theme: ThemeMode,
     #[serde(default)]
-    pub show_status_bar: bool,
-    #[serde(default)]
     pub ui_scale: UiScaleSettings,
     #[serde(default)]
     pub graphics_power: GraphicsPowerPreference,
diff --git a/crates/core/src/settings/tests.rs b/crates/core/src/settings/tests.rs
index 6654e44..53a4f76 100644
--- a/crates/core/src/settings/tests.rs
+++ b/crates/core/src/settings/tests.rs
@@ -20,7 +20,6 @@ fn missing_fields_take_defaults() {
         settings.appearance.graphics_power,
         GraphicsPowerPreference::LowPower
     );
-    assert!(!settings.appearance.show_status_bar);
     assert_eq!(settings.window.task_cards.craft.width, 520.0);
     assert_eq!(settings.window.task_cards.processing.width, 340.0);
 }
@@ -104,7 +103,6 @@ fn save_and_load_roundtrip() {
     settings.general.project_backup_generations = 3;
     settings.export.include_view_snapshots = true;
     settings.export.trim_to_visible_content = true;
-    settings.appearance.show_status_bar = true;
     settings.window.task_cards.craft = TaskCardSize::new(612.0, 688.0);
 
     io::save_to_path(&path, &settings).unwrap();
@@ -116,7 +114,6 @@ fn save_and_load_roundtrip() {
     assert_eq!(loaded.general.project_backup_generations, 3);
     assert!(loaded.export.include_view_snapshots);
     assert!(loaded.export.trim_to_visible_content);
-    assert!(loaded.appearance.show_status_bar);
     assert_eq!(
         loaded.window.task_cards.craft,
         TaskCardSize::new(612.0, 688.0)
diff --git a/crates/core/src/state/app_impl.rs b/crates/core/src/state/app_impl.rs
index 2b828f8..7857f68 100644
--- a/crates/core/src/state/app_impl.rs
+++ b/crates/core/src/state/app_impl.rs
@@ -66,6 +66,7 @@ impl PlotxApp {
                 secondary_sidebar_visible: true,
                 status: "Open data or a project to begin.".into(),
                 operation_history: OperationHistory::default(),
+                status_history: super::StatusHistory::default(),
                 project_load_warnings: Vec::new(),
                 recent_files: {
                     let mut files = settings.recent.files.clone();
diff --git a/crates/core/src/state/mod.rs b/crates/core/src/state/mod.rs
index 5983620..a97258a 100644
--- a/crates/core/src/state/mod.rs
+++ b/crates/core/src/state/mod.rs
@@ -48,6 +48,8 @@ mod app_impl_statistics_tests;
 mod app_impl_symmetry;
 mod app_impl_xps;
 mod app_state;
+mod status_history;
+pub use status_history::{StatusHistory, StatusMessage};
 mod axis_overrides;
 mod board;
 mod charts;
diff --git a/crates/core/src/state/status_history.rs b/crates/core/src/state/status_history.rs
new file mode 100644
index 0000000..7d111e8
--- /dev/null
+++ b/crates/core/src/state/status_history.rs
@@ -0,0 +1,75 @@
+use std::collections::VecDeque;
+use std::time::SystemTime;
+
+const MESSAGE_LIMIT: usize = 200;
+
+#[derive(Clone, Debug)]
+pub struct StatusMessage {
+    pub recorded_at: SystemTime,
+    pub text: String,
+}
+
+/// Session-only messages formerly displayed in the workspace status strip.
+#[derive(Default)]
+pub struct StatusHistory {
+    messages: VecDeque<StatusMessage>,
+    last_observed: String,
+}
+
+impl StatusHistory {
+    pub fn observe(&mut self, status: &str) {
+        if self.last_observed == status {
+            return;
+        }
+        self.last_observed = status.to_owned();
+        if status.trim().is_empty() {
+            return;
+        }
+        self.messages.push_back(StatusMessage {
+            recorded_at: SystemTime::now(),
+            text: status.to_owned(),
+        });
+        if self.messages.len() > MESSAGE_LIMIT {
+            self.messages.pop_front();
+        }
+    }
+
+    pub fn messages(&self) -> impl DoubleEndedIterator<Item = &StatusMessage> + ExactSizeIterator {
+        self.messages.iter()
+    }
+
+    pub fn clear(&mut self) {
+        // Keep the observation watermark so clearing does not reinsert the current message.
+        self.messages.clear();
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn observations_deduplicate_and_clear_without_reappearing() {
+        let mut history = StatusHistory::default();
+        history.observe("Loaded");
+        history.observe("Loaded");
+        assert_eq!(history.messages().len(), 1);
+        history.clear();
+        history.observe("Loaded");
+        assert_eq!(history.messages().len(), 0);
+        history.observe("Saved");
+        history.observe("Loaded");
+        assert_eq!(history.messages().len(), 2);
+    }
+
+    #[test]
+    fn retains_recent_messages_in_order_with_a_bounded_size() {
+        let mut history = StatusHistory::default();
+        for index in 0..250 {
+            history.observe(&format!("Message {index}"));
+        }
+        assert_eq!(history.messages().len(), MESSAGE_LIMIT);
+        assert_eq!(history.messages().next().unwrap().text, "Message 50");
+        assert_eq!(history.messages().next_back().unwrap().text, "Message 249");
+    }
+}
diff --git a/crates/core/src/state/ui_state.rs b/crates/core/src/state/ui_state.rs
index 7c7dd0d..98769dd 100644
--- a/crates/core/src/state/ui_state.rs
+++ b/crates/core/src/state/ui_state.rs
@@ -626,6 +626,7 @@ pub struct Session {
     pub secondary_sidebar_visible: bool,
     pub status: String,
     pub operation_history: OperationHistory,
+    pub status_history: super::StatusHistory,
     /// Non-fatal resource failures collected while opening the current project.
     pub project_load_warnings: Vec<String>,
     /// Runtime cache of the persisted recent-files list (newest first), seeded
@@ -678,16 +679,18 @@ impl Session {
         self.operation_history.next_id()
     }
 
-    /// Stores the report and projects its summary onto the legacy status line.
+    /// Stores the report and makes its summary the current activity message.
     pub fn record_operation<T>(&mut self, report: OperationReport<T>) -> Option<T> {
         let (record, value) = report.into_parts();
         self.status = record.summary.clone();
+        self.status_history.observe(&self.status);
         self.operation_history.push(record);
         value
     }
 
     pub fn clear_operation_history(&mut self) {
         self.operation_history.clear();
+        self.status_history.clear();
     }
 
     pub fn sanitized_diagnostics_text(&self) -> String {
diff --git a/docs/src/content/docs/guides/contour-levels.md b/docs/src/content/docs/guides/contour-levels.md
index b7f8c60..90a28e4 100644
--- a/docs/src/content/docs/guides/contour-levels.md
+++ b/docs/src/content/docs/guides/contour-levels.md
@@ -55,7 +55,7 @@ ceiling on what you can ask for: choose the **Absolute level** anchor to set any
 level you like, including one inside the noise.
 
 If you set an **Absolute level** the data never reaches, that half draws nothing
-and the status bar reports both numbers — for example, *The positive contour
+and the Operation history reports both numbers — for example, *The positive contour
 threshold 20000 is above this field's positive peak 1800, so no positive
 contours are drawn. Lower the threshold below 1800.* A slipped decimal point is
 visible at a glance that way.
@@ -86,7 +86,7 @@ corner of the plot, resolved the same way as in the panel — `5 × σ = 1.2e4`.
 plot whose contour series do not all sit at the same level says so instead of
 showing one of them. Stepping is an
 ordinary edit: it can be undone, and a step past the highest value the current
-anchor allows is refused, with the reason in the status bar.
+anchor allows is refused, with the reason in the Operation history.
 
 ## Line width
 
@@ -136,7 +136,7 @@ A ladder can also stop early at the bottom. A level that falls inside the noise
 crosses most of the grid, and there is a limit to how much line one plot can
 draw. Past that limit PlotX drops the remaining levels whole — never cutting a
 contour off part-way along its own path — and drops the same levels from both
-signs, so what you see is a complete ladder with a higher floor. The status bar
+signs, so what you see is a complete ladder with a higher floor. The Operation history
 says how many went and what to set instead, for example: *The lowest 14 contour
 levels were not drawn: at 5.052e4 and below, this field crosses more of the grid
 than one plot can render. Raise the lowest level to 6.820e4 or above to see
@@ -149,7 +149,7 @@ signs — the negative half mirrors the positive ladder and applies its own sign
 
 Contour geometry, and the noise or background estimate a ladder is anchored to,
 are computed away from the interface so a large plane never freezes the
-application. Until they land the plot is empty, and the status bar says which
+application. Until they land the plot is empty, and the Operation history says which
 step is running — *Measuring this field's noise scale…*, then *Building contour
 geometry…* — so a plot that is merely slow is never mistaken for one that has
 failed. Large planes take a moment; the plot fills in by itself. The work is
@@ -193,7 +193,7 @@ the range and you get a fraction, not a noise multiple.
 **Reset contour** rebuilds the whole contour — anchor, ladder and colours — from
 the defaults for this data. It touches only the series drawn as contours;
 anything else in the same plot, such as a heatmap underneath, is left as it is
-and reported as skipped in the status bar.
+and reported as skipped in the Operation history.
 
 ## Finding a setting
 
diff --git a/docs/src/content/docs/guides/heatmap-range.md b/docs/src/content/docs/guides/heatmap-range.md
index 66bdc37..946c11b 100644
--- a/docs/src/content/docs/guides/heatmap-range.md
+++ b/docs/src/content/docs/guides/heatmap-range.md
@@ -30,7 +30,7 @@ returns the whole range to the field's finite minimum and maximum as they are
 now, rather than restoring an older number.
 **Reset heatmap** rebuilds the whole heatmap encoding from its defaults, and
 touches only the series drawn as heatmaps: contours in the same plot are left
-alone and reported as skipped in the status bar.
+alone and reported as skipped in the Operation history.
 
 A field with no finite values has nothing to derive a scale from, and the rows
 say so instead of showing a number.
diff --git a/docs/src/content/docs/guides/layout-and-export.md b/docs/src/content/docs/guides/layout-and-export.md
index 21bcff5..c9b75a0 100644
--- a/docs/src/content/docs/guides/layout-and-export.md
+++ b/docs/src/content/docs/guides/layout-and-export.md
@@ -169,7 +169,7 @@ at.
 
 If the move leaves the source page empty, PlotX deletes that page as part of the
 drop, so the move and the deletion undo together. Hold `Alt` as you release to
-keep the empty page instead; the status bar shows which way `Alt` will flip the
+keep the empty page instead; the Operation history shows which way `Alt` will flip the
 current drop. To keep empty source pages by default, turn on **Keep source canvas
 when tiling its last object** in Preferences → General — `Alt` then removes them
 for that one drop.
@@ -195,7 +195,7 @@ There are two ways in:
 - Run **Simplify Inner Axes** — on the Arrange Ribbon tab, in the canvas
   right-click Arrange menu, or from the command palette — to simplify plots
   that are already in place. It needs at least two plots aligned in a grid;
-  otherwise the status bar says what to fix.
+  otherwise the Operation history says what to fix.
 
 To bring text back on one panel, select it and use **Axes** in the Object
 inspector: the **X text** and **Y text** rows toggle **Tick labels** and
@@ -283,7 +283,7 @@ What you control directly:
   em dash and the word *mixed* rather than presenting one of them as the
   setting; setting the row is what makes them agree. A selected series that is
   drawn as something else — a contour, say — is reported as skipped in the
-  status bar, and the rest still take the value. A width that differs from the
+  Operation history, and the rest still take the value. A width that differs from the
   one PlotX would choose for this data is marked with a dot, and the reset
   button beside it re-derives that default.
 - **Canvas themes** carry matching sizes — the Presentation Dark theme, for
diff --git a/docs/src/content/docs/guides/processing.md b/docs/src/content/docs/guides/processing.md
index a6a8c19..f2f8d88 100644
--- a/docs/src/content/docs/guides/processing.md
+++ b/docs/src/content/docs/guides/processing.md
@@ -45,7 +45,7 @@ invent an FID for data it never acquired.
 Processing opens as a card at the upper right of the canvas — from the
 **Process** tab of the Ribbon, or by activating a processing setting found with
 <kbd>Ctrl</kbd>+<kbd>K</kbd>. If the active dataset is not an NMR dataset, the
-status bar reads *Select an NMR dataset before opening Processing.* instead.
+Operation history reads *Select an NMR dataset before opening Processing.* instead.
 
 The card can also host the CRAFT, Regions, Curve Fit, and Statistics tasks.
 When two or more tasks are open, tabs appear along the top — **Process**,
diff --git a/docs/src/content/docs/guides/pseudo-2d.md b/docs/src/content/docs/guides/pseudo-2d.md
index b4d72ef..73a8288 100644
--- a/docs/src/content/docs/guides/pseudo-2d.md
+++ b/docs/src/content/docs/guides/pseudo-2d.md
@@ -66,7 +66,7 @@ chemical-shift × diffusion map. Map builds run in the background and you can
 keep working; **Cancel** discards one. A map cannot be rebuilt for the same
 dataset until the current build finishes or is cancelled. Changing the
 dataset's processing while a map is building cancels the build — the map would
-no longer match the spectrum. The status bar tells you when that happens;
+no longer match the spectrum. The Operation history tells you when that happens;
 simply rebuild the map after the processing change. Changing the processing
 also discards a finished map for the same reason, so the plot falls back to the
 stack until you rebuild.
@@ -81,7 +81,7 @@ Both kinds of DOSY map are saved in the `.plotx` project along with your
 **Show** and **DOSY method** choices, so reopening a project puts the same plot
 back on screen without rebuilding. If a saved map was built from data that the
 project's stored processing no longer reproduces, PlotX keeps showing the saved
-map and warns you — in the status bar as the project opens, and in the
+map and warns you — in the Operation history as the project opens, and in the
 **Experiment** card. If a saved map cannot be read back at all, PlotX shows the
 stack instead and says so in the same two places. Rebuilding the map clears the
 warning.
diff --git a/docs/src/content/docs/reference/reporting-problems.md b/docs/src/content/docs/reference/reporting-problems.md
index 2416a21..8c07ec8 100644
--- a/docs/src/content/docs/reference/reporting-problems.md
+++ b/docs/src/content/docs/reference/reporting-problems.md
@@ -6,7 +6,7 @@ description: Find the diagnostic files to attach when reporting a PlotX crash or
 ## After a crash
 
 When PlotX catches an internal error, it saves a plain-text crash report and
-shows its full path. On the next launch, the recovery dialog or status bar
+shows its full path. On the next launch, the recovery dialog or Operation history
 shows that path again. Attach the report to a
 [GitHub issue](https://github.com/nmrtist/plotx/issues); it contains the PlotX
 version, platform, panic location, backtrace, and the tail of the session log.
diff --git a/docs/src/content/docs/reference/ui-overview.md b/docs/src/content/docs/reference/ui-overview.md
index 8418b18..ed0ac4c 100644
--- a/docs/src/content/docs/reference/ui-overview.md
+++ b/docs/src/content/docs/reference/ui-overview.md
@@ -35,9 +35,11 @@ introduces the same regions in walkthrough form.
   task row also holds the native window controls and project name. It is a
   shortcut surface: everything on it is also in the menus or command palette.
   See [the Ribbon](/reference/ribbon/) for every tab's groups.
-- **Status bar** — the bottom strip, showing hints, progress, and selection
-  details. It is hidden by default to leave more room for the workspace; enable
-  **Show status bar** under **Preferences → Appearance** when you want it.
+- **Operation history** — the clock-arrow button in the Ribbon task row opens
+  the current status and dataset summary. **Messages** keeps the latest 200
+  observed status changes for this session; **Diagnostics** shows structured
+  operation reports. **Clear** clears both lists. Hover the button for the
+  current status. Errors and warnings also appear in the feedback banner.
 
 Both Side Bars can be shown or hidden at any time: click the pair of layout
 buttons at the right end of the Ribbon's task row, press
diff --git a/docs/src/content/docs/zh-cn/guides/contour-levels.md b/docs/src/content/docs/zh-cn/guides/contour-levels.md
index a362994..e24a3f2 100644
--- a/docs/src/content/docs/zh-cn/guides/contour-levels.md
+++ b/docs/src/content/docs/zh-cn/guides/contour-levels.md
@@ -44,7 +44,7 @@ measured`（未测出离散度）：此时倍数无从锚定，层级会退回
 **Absolute level**（绝对强度）锚定即可设成任意值，包括落在噪声里的值。
 
 如果把 **Absolute level**（绝对强度）设成数据根本达不到的值，该半区将什么都不画，
-状态栏会同时给出两个数字，例如：*The positive contour threshold 20000 is above
+操作历史窗口会同时给出两个数字，例如：*The positive contour threshold 20000 is above
 this field's positive peak 1800, so no positive contours are drawn. Lower the
 threshold below 1800.*（正半区阈值 20000 高于该场的正向峰值 1800，因此不绘制正
 等高线；请把阈值降到 1800 以下。）小数点打错一位，一眼就能看出来。
@@ -69,7 +69,7 @@ threshold below 1800.*（正半区阈值 20000 高于该场的正向峰值 1800
 `5 × σ = 1.2e4`；若图中多条等高线谱线的最低层并不一致，它会如实说明，而不是拿
 其中一条冒充整体。这种调整就是一次普通
 编辑：可以撤销；若一步会越过当前锚定允许的最大值，该步会被拒绝，原因显示在
-状态栏。
+操作历史窗口。
 
 ## 线宽
 
@@ -110,7 +110,7 @@ threshold below 1800.*（正半区阈值 20000 高于该场的正向峰值 1800
 阶梯也可能从下端提前终止。落在噪声里的层会穿过网格的大部分区域，而一幅图能绘制
 的线量是有上限的。超过该上限后，PlotX 会整层丢弃剩余层级——绝不会把某条等高线
 从中途截断——并且正负两个半区同时丢弃同样的层，因此你看到的始终是一组完整的、
-只是下限更高的阶梯。状态栏会说明丢弃了多少层、应改设成什么，例如：*The lowest 14
+只是下限更高的阶梯。操作历史窗口会说明丢弃了多少层、应改设成什么，例如：*The lowest 14
 contour levels were not drawn: at 5.052e4 and below, this field crosses more of
 the grid than one plot can render. Raise the lowest level to 6.820e4 or above to
 see every level the panel lists.*（最低的 14 层未绘制：在 5.052e4 及以下，该场
@@ -123,7 +123,7 @@ see every level the panel lists.*（最低的 14 层未绘制：在 5.052e4 及
 ## 绘制过程中
 
 等高线几何，以及阶梯所锚定的噪声或背景估计，都在界面之外计算，因此再大的平面也
-不会卡住整个程序。在结果到达之前图上是空的，状态栏会说明当前进行到哪一步——
+不会卡住整个程序。在结果到达之前图上是空的，操作历史窗口会说明当前进行到哪一步——
 *Measuring this field's noise scale…*（正在测量该场的噪声尺度）、
 *Building contour geometry…*（正在构建等高线几何）——这样"只是慢"就不会被当成
 "坏掉了"。大平面需要片刻，图会自行填充。这些计算是共享的：同一份数据、同一组层级
@@ -158,7 +158,7 @@ see every level the panel lists.*（最低的 14 层未绘制：在 5.052e4 及
 
 **Reset contour**（重置等高线）会按该数据的默认值重建整条等高线——锚定、阶梯和
 颜色。它只作用于以等高线绘制的谱线；同一张图里的其他内容（例如底下的热图）保持
-原样，并在状态栏中作为跳过项报告。
+原样，并在操作历史窗口中作为跳过项报告。
 
 ## 找到某个设置
 
diff --git a/docs/src/content/docs/zh-cn/guides/heatmap-range.md b/docs/src/content/docs/zh-cn/guides/heatmap-range.md
index 73799cf..dd7f2f3 100644
--- a/docs/src/content/docs/zh-cn/guides/heatmap-range.md
+++ b/docs/src/content/docs/zh-cn/guides/heatmap-range.md
@@ -24,7 +24,7 @@ Secondary Side Bar 顶部的对象检查器中。分节标题会写明即将编
 被改过的行会带一个圆点标记。悬停圆点可查看 PlotX 会取的值，点旁边的重置按钮即可
 还原。重置任一行都会让整个区间回到该场当前的有限最小值与最大值，而不是恢复某个
 旧数值。**Reset heatmap**（重置热图）则按默认值重建整个热图编码，并且只作用于以
-热图绘制的谱线：同一幅图里的等高线不受影响，并在状态栏中报告为已跳过。
+热图绘制的谱线：同一幅图里的等高线不受影响，并在操作历史窗口中报告为已跳过。
 
 若某个场没有有限值，就无从推导色阶，相关行会如实说明，而不是给出一个数字。
 
diff --git a/docs/src/content/docs/zh-cn/guides/layout-and-export.md b/docs/src/content/docs/zh-cn/guides/layout-and-export.md
index e1e056b..3e640e1 100644
--- a/docs/src/content/docs/zh-cn/guides/layout-and-export.md
+++ b/docs/src/content/docs/zh-cn/guides/layout-and-export.md
@@ -135,7 +135,7 @@ ACS、Elsevier、PNAS 和 IEEE，数值取自各出版社的作图规范）、
 拖入的图落在指针所指的那一格里。
 
 如果这次移动把源页面清空，PlotX 会随本次拖放一并删除该页面，移动与删除
-同属一步撤销/重做。释放鼠标时按住 `Alt` 则保留这个空页面；状态栏会提示
+同属一步撤销/重做。释放鼠标时按住 `Alt` 则保留这个空页面；操作历史窗口会提示
 当前这次拖放按住 `Alt` 会变成哪种结果。若希望默认保留空的源页面，可在
 偏好设置 → General 中打开 **Keep source canvas when tiling its last
 object**——此后按住 `Alt` 就只为这一次拖放删除空页面。
@@ -157,7 +157,7 @@ object**——此后按住 `Alt` 就只为这一次拖放删除空页面。
   占用原先被隐藏文字占据的空间。
 - 对已经排好的图形，可从 Arrange Ribbon 选项卡、画布右键的 Arrange 菜单
   或命令面板运行 **Simplify Inner Axes**。它要求至少有两个图形已对齐成
-  网格；否则状态栏会提示需要先做什么。
+  网格；否则操作历史窗口会提示需要先做什么。
 
 若要让某个分图重新显示文字，选中它后在对象检查器的 **Axes** 区域操作：
 **X text** 与 **Y text** 两行可分别切换 **Tick labels** 和 **Title**，
@@ -226,7 +226,7 @@ NMR 核素质量数。新数据集默认使用 89 × 60 mm 单栏画布：单个
 
   当所选序列的线宽并不一致时，控件显示破折号和 *mixed*，而不会把其中一
   个值当成当前设置；此时写入一个值正是让它们重新一致的方式。所选序列中
-  以别的方式绘制的（例如等高线）会在状态栏里报告为跳过，其余序列照常生
+  以别的方式绘制的（例如等高线）会在操作历史窗口里报告为跳过，其余序列照常生
   效。若某个线宽不同于 PlotX 会为这份数据选择的值，该行会标上圆点，旁边
   的重置按钮按当前数据重新推导默认值。
 - **画布主题**携带配套字号——例如 Presentation Dark 主题会放大坐标轴
diff --git a/docs/src/content/docs/zh-cn/guides/processing.md b/docs/src/content/docs/zh-cn/guides/processing.md
index f8c7921..111ed1b 100644
--- a/docs/src/content/docs/zh-cn/guides/processing.md
+++ b/docs/src/content/docs/zh-cn/guides/processing.md
@@ -34,7 +34,7 @@ XPS 为每个谱区使用独立的有序 recipe，而不是 NMR 管线。recipe
 
 处理以卡片形式出现在画布右上角，可从 Ribbon 的 **Process** 页签打开，或用
 <kbd>Ctrl</kbd>+<kbd>K</kbd> 搜到某个处理设置后激活它。若当前数据集不是 NMR
-数据集，状态栏会提示 *Select an NMR dataset before opening Processing.*，卡片
+数据集，操作历史窗口会提示 *Select an NMR dataset before opening Processing.*，卡片
 不会打开。
 
 该卡片也可以承载 CRAFT、Regions、Curve Fit 和 Statistics 任务。同时打开两个及以上
diff --git a/docs/src/content/docs/zh-cn/guides/pseudo-2d.md b/docs/src/content/docs/zh-cn/guides/pseudo-2d.md
index 128f1ae..b14a047 100644
--- a/docs/src/content/docs/zh-cn/guides/pseudo-2d.md
+++ b/docs/src/content/docs/zh-cn/guides/pseudo-2d.md
@@ -54,7 +54,7 @@ traces…**。选择参考增量和峰区间后，在选择 **Apply** 前检查
 变换（ILT），可生成完整的化学位移 × 扩散系数图。图在后台构建，期间可继续
 操作；按**取消**可丢弃该构建。同一数据集在当前构建完成或取消前不能重复构建
 同类图。构建期间修改该数据集的处理参数会取消构建——否则图与谱图将不再对应。
-状态栏会在发生取消时提示；处理修改完成后重新构建即可。出于同样的原因，修改
+操作历史窗口会在发生取消时提示；处理修改完成后重新构建即可。出于同样的原因，修改
 处理参数也会丢弃已经算好的图，画面会退回堆叠图，直到你重新构建。
 
 下一次 ILT 构建所用的设置按以下顺序确定：你在 **Experiment** 卡片中为该数据集
@@ -65,7 +65,7 @@ traces…**。选择参考增量和峰区间后，在选择 **Apply** 前检查
 两种 DOSY 图都会随 `.plotx` 项目一起保存，**Show** 和 **DOSY method** 的选择
 也一并保存，因此重新打开项目时无需重算即可看到同一张图。如果保存的图所依据的
 数据与项目中保存的处理流程重建出的数据不再一致，PlotX 会继续显示保存的图并给出
-警告——打开项目时出现在状态栏，同时也出现在 **Experiment** 卡片中。如果保存的图
+警告——打开项目时出现在操作历史窗口，同时也出现在 **Experiment** 卡片中。如果保存的图
 完全无法读回，PlotX 会改为显示堆叠图，并在同样两处说明。重新构建该图即可消除
 警告。
 
diff --git a/docs/src/content/docs/zh-cn/reference/reporting-problems.md b/docs/src/content/docs/zh-cn/reference/reporting-problems.md
index 869e494..28a055e 100644
--- a/docs/src/content/docs/zh-cn/reference/reporting-problems.md
+++ b/docs/src/content/docs/zh-cn/reference/reporting-problems.md
@@ -6,7 +6,7 @@ description: 报告 PlotX 崩溃或运行问题时，找到需要附上的诊断
 ## 崩溃之后
 
 PlotX 捕获到内部错误时，会保存纯文本崩溃报告并显示完整路径。下次启动时，
-恢复对话框或状态栏会再次显示该路径。请把报告附到
+恢复对话框或操作历史窗口会再次显示该路径。请把报告附到
 [GitHub issue](https://github.com/nmrtist/plotx/issues)；其中包含 PlotX
 版本、平台、panic 位置、回溯以及会话日志末尾。
 
diff --git a/docs/src/content/docs/zh-cn/reference/ui-overview.md b/docs/src/content/docs/zh-cn/reference/ui-overview.md
index 89ee82a..7094b2d 100644
--- a/docs/src/content/docs/zh-cn/reference/ui-overview.md
+++ b/docs/src/content/docs/zh-cn/reference/ui-overview.md
@@ -30,9 +30,10 @@ PlotX 的界面为英文；手册中加粗的英文词即界面上的原文标
   **Analyze**、**Figure**、**Arrange**、**View**）。在 macOS 上，其任务行
   还承载原生窗口按钮和项目名。它是快捷入口：其上的一切也都能在菜单或命令面板中找到。
   各页签的分组详见 [Ribbon](/zh-cn/reference/ribbon/)。
-- **状态栏**——底部条带，显示提示、进度和选择详情。默认隐藏，以便为工作区
-  留出更多空间；需要时可在 **Preferences → Appearance** 中开启
-  **Show status bar**。
+- **操作历史（Operation history）**——点击 Ribbon 任务行的时钟箭头图标，
+  可查看当前状态和数据集摘要。**Messages** 保留本次运行最近 200 条已观察到的
+  状态变化，**Diagnostics** 显示结构化操作报告；**Clear** 清空两个列表。
+  悬停图标可查看当前状态，错误与警告也会出现在反馈横幅中。
 
 两个侧栏随时可以显示或隐藏：点击 Ribbon 任务行右端的一对布局按钮，按
 <kbd>Ctrl</kbd>+<kbd>B</kbd>（左）或 <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>B</kbd>