Windows Mac
AltB

About This Shortcut 

On Windows, this shortcut only works within the Format Cells dialog box, on the Borders tab. If you use this shortcut in Format Cells, you'll see a bottom border added or removed from the border preview area.

On the Mac, this shortcut works directly on the worksheet, and adds a bottom border to each cell in the selection.

Related videos

The videos below demonstrate this shortcut.

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AuthorMicrosoft Most Valuable Professional Award

Dave Bruns

Hi - I'm Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.