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-rw-r--r--docs/config.md2
-rw-r--r--docs/tags.md5
-rw-r--r--docs/themes.md1
3 files changed, 5 insertions, 3 deletions
diff --git a/docs/config.md b/docs/config.md
index 77ed68e7..c2e0b318 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -316,7 +316,7 @@ name, thirteen required RGB roles (`sel_bg`, `sel_fg`, `tag_bg`, `tag_fg`,
`box`, `box_dim`, `kw`, `str`, `num`, `comment`, `lineno`, `scroll_track`,
`scroll_thumb`), nullable `bg`/`fg`, and either a 16-color RGB `palette` or
`null`. Optional nullable RGB roles extend this format:
-`tag_active_bg`, `tag_active_fg`, `tag_name_fg`, `tag_active_name_fg`, `border`, `lineno_active`, `search_bg`, `search_fg`,
+`tag_active_bg`, `tag_active_fg`, `tag_name_fg`, `tag_active_name_fg`, `border`, `empty_col`, `lineno_active`, `search_bg`, `search_fg`,
`diagnostic_error`, `diagnostic_warning`, `diagnostic_info`, and
`diagnostic_hint`. Missing new roles use backward-compatible defaults, so
previously exported files remain valid. [Theme customization](themes.md)
diff --git a/docs/tags.md b/docs/tags.md
index 7787d7f1..26f3dcf0 100644
--- a/docs/tags.md
+++ b/docs/tags.md
@@ -172,8 +172,9 @@ underlines and the optional `SyntaxBold` keyword weight.
## Empty columns
-A column can hold no pane, as acme's can: its tag stands over blank space, the
-frame's own fill, where acme paints white (cols.c:186-188). `Newcol` makes an
+A column can hold no pane, as acme's can: its tag stands over blank space in
+the theme's `empty_col` colour, white in the acme theme as acme paints it
+(cols.c:186-188), and the frame's border fill in themes that do not set it. `Newcol` makes an
empty column right of the keyboard's and gives its tag the keyboard. Closing a
column's last pane (`Del`, `Del k`/`Del j`, a shell exiting, a drag to another
column) leaves the column empty where it was, and the keyboard goes to its tag
diff --git a/docs/themes.md b/docs/themes.md
index 8cc4ff9b..103a3f5a 100644
--- a/docs/themes.md
+++ b/docs/themes.md
@@ -108,6 +108,7 @@ so existing exported themes remain valid.
| `column_box` | Column grip while held, and its drag rail | `num` |
| `column_box_dim` | Column drag grip at rest, in every focus state | Equal mix of `column_box` and `tag_bg` |
| `border` | Quiet separators | `scroll_track` |
+| `empty_col` | A column with no pane, under its tag (acme: white) | `border` |
| `lineno_active` | Restrained current line number foreground | `lineno` |
| `search_bg`, `search_fg` | Search matches, independent of selection | `sel_bg`, `sel_fg` |
| `diagnostic_error` | Error text | `fg`, or `tag_fg` for an inherited foreground |