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Undo and Redo

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While writing formulas use the 'UNDO' and 'REDO' buttons to correct or restore changes you have made to formulas.
The keyboard shortcut for Undo is 'Ctrl + Z'
The keyboard shortcut for Redo is 'Ctrl + Y'

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Tip:

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If you closed the program before saving your formulation, had a power cut or computer crash, then the last screen before exiting/changing can usually be recovered with the Undo button.

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