diff --git a/docs/src/key-bindings.md b/docs/src/key-bindings.md
index de3104e70b..6490e058b0 100644
--- a/docs/src/key-bindings.md
+++ b/docs/src/key-bindings.md
@@ -60,6 +60,7 @@ Each keypress is a sequence of modifiers followed by a key. The modifiers are:
 - `alt-` for alt (option on macOS)
 - `shift-` The shift key
 - `fn-` The function key
+- `secondary-` Equivalent to `cmd` when Zed is running on macOS and `ctrl` when on Windows and Linux
 
 The keys can be any single unicode codepoint that your keyboard generates (for example `a`, `0`, `£` or `ç`), or any named key (`tab`, `f1`, `shift`, or `cmd`). If you are using a non-Latin layout (e.g. Cyrillic), you can bind either to the cyrillic character, or the latin character that that key generates with `cmd` pressed.