what is the shortcut key for redo

The common shortcut key for redo is:

• Windows & many apps: Ctrl + Y (sometimes Ctrl + Shift + Z in design or cross‑platform tools)

• macOS: Command (⌘) + Shift + Z

• Microsoft Office (Windows): Ctrl + Y or F4 to repeat/redo the last action

In most everyday apps, if Ctrl + Y (or ⌘ + Shift + Z on Mac) does nothing, check the Edit → Redo menu to see the exact shortcut used in that program.