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Decrease font size one step

Windows shortcut 
AltHFK
Mac shortcut 
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This shortcut will decrease the font size of current selection but one "step". Steps correspond to the sizes shown in the font size menu.

Related videos

The videos below demonstrate this shortcut.
In this lesson, we cover shortcuts you can use to format cells and other objects.
In this video, we'll look at the shortcuts you can use for find and replace in Excel.