How to Redo in Notion

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Here is how to perform a Redo in Notion:

In order to perform a Redo, it is necessary to have performed an Undo. So, perform an action to undo such as erasing a word.
Now that the text has been erased, undo this action by using the shortcut (Command/Ctrl + Z) or the menu.
Your text will reappear as undo was performed.
Now, to Redo your last Undo, use the keyboard shortcut of Command/Ctrl + Shift + Z. Your Undo was reversed and your text has been (re)erased.