If you make a mistake, you can go back and undo the error. What is the keyboard shortcut for undo?

What will be an ideal response?

You can back up one step at a time using the keyboard shortcut Control+Z
(Windows) or Command+Z (Mac). You can also access the Undo and Redo
commands in the Edit menu, and use the History panel. There are up to 101
levels of undo and redo in the History panel (accessed by going to the panel
menu).