I have in my Quick Access Toolbar so far Autosave, Save, Undo, Redo, Camera. I want to add Repeat. So I click down to choose "More Commands". In the list of commands in the left I choose "Repeat" and Add it to the list in the right side and click OK.
But in doing so Excel adds another Redo (so I have 2 Redo Icons) and no Repeat.