How to Double Underline in Excel on Mac

Microsoft Excel for Mac has several options for formatting cells to help organize information in business spreadsheets, including two types of double underlines. The first option is the standard double underline, which places two lines under all of the characters within a cell. The second method is the double accounting underline, which places two lines under numbers, but excludes symbols. You can format one cell at a time or format a range of cells at once.

Click the cell that you want to format. If you want to format multiple cells, hold the "Command" button on the keyboard and click the cells.

Right-click the cell, or any of the selected cells, and select "Format Cells."

Click the "Font" tab in the Format Cells window, click the "Underline" drop-down menu, and then select either "Double" or "Double Accounting."

Click "OK" in the Format Cells window to apply your formatting.