diff --git a/docs/customization/keybindings.mdx b/docs/customization/keybindings.mdx
index 63ad7344..cc699d7c 100644
--- a/docs/customization/keybindings.mdx
+++ b/docs/customization/keybindings.mdx
@@ -56,8 +56,14 @@ An action's value takes one of two shapes:
 | `""` or `[]` | **Unbind** the action |
 
 Recording a shortcut on the Settings page replaces, so it writes the list
-shape. A shortcut you add that another action already uses wins: it is the one
-that runs.
+shape. A shortcut you add that another action already uses is the one that
+runs. The exception is the terminal's own shortcuts: copy, paste, find, clear
+scrollback and insert newline keep theirs while a terminal has focus.
+
+Up to 26.9.2 a string replaced the default, and the Settings page wrote
+strings. So a shortcut you recorded in those versions now works *beside* the
+default it was meant to replace. To drop the default again, record the shortcut again
+or wrap it in a list: `"NewTab": ["cmd-shift-n"]`.
 
 The syntax is modifiers joined by `-`, then the key. Chords are separated by a
 space.