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Undo last action

Windows shortcut 
CtrlZ
Mac shortcut 
Z

This shortcut will allow multiple levels of undo; each time you use it Excel will step back one level.

Related videos

The videos below demonstrate this shortcut.
In this video, we show you how to step back in time and undo changes you've made using undo, and how to step forward again using redo.
In this video we look at how to create a mixed reference that is part relative and part absolute; useful when you want only part of a cell reference to change.
In this video, we’ll look at a basic example of sorting with the SORT function. Sorting with formulas is a traditionally hard problem in Excel new dynamic array formulas make much easier.
One of the cool things you can do with Paste Special is make "in place" changes to numbers. This is a handy way to quickly change things like dates, prices, and times without using formulas.
In this video, we'll look at how to add a slicer to a pivot chart. Slicers provide a powerful way to filter data interactively, and they are a key building block of many dashboards.

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