how do you undo command z code example

Example: mac undo and redo command

Undo or redo changes in Pages on Mac
You can undo recent changes you make to a document, then redo them if you change your mind.

Do any of the following:

Undo the last action: Choose Edit > Undo (from the Edit menu at the top of your screen), or press Command-Z on your keyboard.

Redo the last action you undid: Choose Edit > Redo, or press Command-Shift-Z.