diff --git a/README.en.md b/README.en.md
index 2b12f28..9a33f68 100644
--- a/README.en.md
+++ b/README.en.md
@@ -59,7 +59,7 @@ The config is TOML, read from the `CODEVIEW_CONFIG` environment variable, or `co
 
 | Section | Meaning |
 |---|---|
-| `[[roots]]` | Where to scan. A `group`, plus exactly one of `path` (that directory is one repository) or `children` (every git repository directly under it). The order is the order of the left menu on the top page |
+| `[[roots]]` | Where to scan. A `group`, plus exactly one of `path` (that directory is one repository) or `children` (every git repository directly under it). The order is the order of the groups in the left menu on the top page. Within a group, repositories with more files come first |
 | `[scan]` | `skip_dirs` (directory names not to scan), `exclude_prefixes` (path prefixes not to output), `skip_exts` (extensions not to output). To add exclusions for one repository, put `skip_exts` and `exclude_prefixes` in `[scan.repos."<slug>"]` (added to the global values; the slug is the repository's path in the output) |
 | `[[accounts]]` | The unit issues are grouped by; 1 or 2 of them. `name`, `hosts` (hosts of the `origin` remote), `groups` (the fallback when there is no remote), `issues` (the default `github`, or the module name of an extension that returns issues), `gh_config_dir` (the gh config dir used when `issues = "github"`) |
 | `[publish]` | The `remote` (default `origin`) and `branch` (default `deploy`) to publish to |
diff --git a/README.md b/README.md
index 99811c8..492e81a 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ codeview serve   # http://localhost:8787 で確認する
 
 | 節 | 意味 |
 |---|---|
-| `[[roots]]` | 走査する置き場。`group` と、`path`（そのディレクトリが1つのリポ）か `children`（直下の git リポすべて）のどちらか一方。並び順がトップの左メニューの順になる |
+| `[[roots]]` | 走査する置き場。`group` と、`path`（そのディレクトリが1つのリポ）か `children`（直下の git リポすべて）のどちらか一方。並び順がトップの左メニューのグループの順になる。グループの中は、ファイル数の多いリポから並ぶ |
 | `[scan]` | `skip_dirs`（走査しないディレクトリ名）・`exclude_prefixes`（出力しないパスの接頭辞）・`skip_exts`（出力しない拡張子）。リポごとに足すときは `[scan.repos."<slug>"]` に `skip_exts` と `exclude_prefixes` を書く（全体の値に足される。slug はページのパスと同じ） |
 | `[[accounts]]` | Issue をまとめる単位で、1〜2個。`name`・`hosts`（`origin` の remote のホスト）・`groups`（remote が無いときの決め手）・`issues`（既定の `github` か、Issue を返す拡張のモジュール名）・`gh_config_dir`（`issues = "github"` のときに使う gh の config dir） |
 | `[publish]` | 配信先の `remote`（既定 `origin`）と `branch`（既定 `deploy`） |
diff --git a/codeview/layout.py b/codeview/layout.py
index 274cdcd..d80e9f1 100644
--- a/codeview/layout.py
+++ b/codeview/layout.py
@@ -282,7 +282,7 @@ def index_side(counts, board, extra: str = "") -> str:
             f'<a class="item" href="/{slug}/">'
             f'<span class="t">{html.escape(name)}</span>'
             f'<span class="m">{n:,}</span></a>'
-            for slug, name, n in items
+            for slug, name, n in sorted(items, key=lambda it: (-it[2], it[1].lower()))
         )
         blocks.append(f'<h2 class="dhead">{html.escape(group)}</h2>{rows}')
     return side_head("") + '<div id="list">' + "".join(blocks) + "</div>"