You’ll find the Undo and Redo stacks on the standard toolbar.  Just make sure the cursor is in a text editor to enable these toolbars.

Undo command stack on standard toolbar

Instead of having to press Ctrl-Z or Ctrl-Y multiple times to undo multiple commands, you can drop down the Undo or Redo toolbar and select consecutively starting from the top all the actions you wish to undo or redo.

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