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-rw-r--r--docs/config.md7
1 files changed, 5 insertions, 2 deletions
diff --git a/docs/config.md b/docs/config.md
index 58797dfe..8c9c96d0 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -162,12 +162,15 @@ band would overlap its pane body or a neighbour instead of leaving the body
grid stable. `Config` reports the active percentage. The browser applies the
same compiled percentage to its DOM glyphs but has no runtime setter.
-The SDL GUI joins the reduced-height global and pane tagline bands with
+Both native GUIs join the reduced-height global and pane tagline bands with
`gui_topbar_pane_border_px` physical pixels. Set it to zero for a direct join.
`gui_topbar_pane_border_rgb` can pin an RGB color; its default `null` follows
the active theme's scrollbar-track color. With `Tagbottom` enabled, a tagline
on the final grid row is bottom-aligned so the same unused half-band does not
-show beneath it.
+show beneath it. The rule itself lives in the core
+(`pardes.taglineBandOffset`), and the macOS shell reaches it over the C ABI
+rather than keeping its own copy — it had one, it only ever centred, and the
+seam that leaves between the two bands is what this setting exists to close.
What happens to a codepoint the chosen face has no glyph for differs by shell.
The SDL GUI falls back through a chain it builds itself: embedded Adwaita