Reserved Keyboard Shortcuts

These shortcuts are handled by the operating system and cannot be overridden by browser or Electron apps.

Windows

ShortcutReason
Control + Alt + DelReserved for Windows Security (secure attention sequence).
Alt + TabSwitch between open apps (OS-handled).
Alt + EscapeCycle through apps in the order opened.
Meta + LLocks the computer.
Meta + DShows desktop.
Meta + TabTask View (virtual desktops).
Meta + ROpens Run dialog.
Meta + Control + DNew virtual desktop.
Meta + Shift + SSnip & Sketch.
Control + Shift + EscapeOpens Task Manager directly.

Linux

ShortcutReason
Control + Alt + F1Switch to TTY terminals.
Control + Alt + F2Switch to TTY terminals.
Control + Alt + F3Switch to TTY terminals.
Control + Alt + F4Switch to TTY terminals.
Control + Alt + F5Switch to TTY terminals.
Control + Alt + F6Switch to TTY terminals.
Control + Alt + DelShows logout/restart dialog.
Alt + TabApp switcher.
Control + Alt + Arrow KeysSwitch workspace (virtual desktops).
Meta + DShow desktop.
Meta + LLock screen.
Meta + TabApp switcher (KDE/GNOME).

macOS

ShortcutReason
Meta + SpaceOpens Spotlight search.
Meta + TabApp switcher.
Meta + Option + EscapeForce Quit window.
Meta + Shift + 3Screenshot shortcuts.
Meta + Shift + 4Screenshot shortcuts.
Meta + Shift + 5Screenshot shortcuts.
Control + Meta + PowerForce restart.
Meta + Control + QLock screen.
Meta + HHide current app.