Why Mac uses Cmd where Windows uses Ctrl
Windows and Mac simply settled on different primary modifier keys β Ctrl on Windows, Cmd on Mac β which is why the same action often has two different-looking shortcuts across the two platforms. The underlying logic is otherwise nearly identical, which is why learning one set makes the other easy to pick up.
These are conventions, not guarantees
Because these shortcuts are conventions rather than a technical standard, a small number of apps remap them for their own purposes. When in doubt, most apps list their exact shortcuts in a Help menu or a dedicated keyboard shortcuts settings page.
Frequently Asked Questions
Do these shortcuts work on Linux too?
Most Linux desktop environments follow the Windows-style Ctrl-based shortcuts for copy, paste, undo, and similar actions, though some window-switching and system-level shortcuts can differ by distribution and desktop environment.
Why does redo have more than one common shortcut?
Unlike undo, redo was standardized less consistently across early software, so both Ctrl+Y and Ctrl+Shift+Z remain in common use on Windows depending on the application.