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Maximize current workbook window

Windows shortcut 
CtrlF10
Mac shortcut 
fn⌃F10

Maximize or restores the selected workbook window. This shortcut acts as a toggle.

222 Excel Shortcuts for Windows and Mac

Related videos

The videos below show how this shortcut can be used.
Shortcuts to navigate workbooks
In this lesson, we cover shortcuts you can use to navigate workbooks.