Lesson 44: Undo, redo and select all

Undo a mistake, bring it back and select everything in one press.

Undo (Ctrl and Z, or Command and Z on a Mac) takes back the last change, and redo (Ctrl and Y, or Command, Shift and Z on a Mac) brings it back again.

Select all (Ctrl and A) highlights every character in a box, ready to copy, delete or replace. These three shortcuts save time in every program children will use.