Quick, clean, and to the point

Accept and apply

Windows shortcut 
Mac shortcut 

This shortcut will accept and apply the settings in the dialog box.

Related videos

The videos below demonstrate this shortcut.
In this video, we show you how to rename worksheet tabs, and how to format them with color.
How to use your keyboard to navigate dialog boxes in Excel for the Mac
In this video, we'll look at some tips and shortcuts you can use to control dialog boxes using only the keyboard.
In this video, we show you how to delete data from a worksheet.
In this video, we show you the difference between finding formulas and finding values (e.g. 100 vs. $100.00).