Signal Desktop
Expand the composer
To expand the composer in Signal Desktop, press Ctrl + Shift + X. On a Mac, press Cmd + Shift + X instead.
Where it works: Composer
Every documented variant
| System | Environment | Keys |
|---|---|---|
| Mac | Desktop app | CmdShiftX |
| Windows | Desktop app | CtrlShiftX |
Where this comes from
Signal keyboard command reference cards - Signal
Documentation checked on 2026-09-14. That is a documentation review, not a test run inside the application.