Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, and 2013. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Adding Diagonal Borders.

Adding Diagonal Borders

by Allen Wyatt
(last updated April 11, 2015)

Excel allows you to add all sorts of borders to cells in a worksheet. You can place borders on the left, right, top, and bottom of a cell. If you select a range of cells, you can add borders to the left, right, top, bottom, and in between, meaning that the borders could be between cells within the selected range.

Many people don't realize that you can also place diagonal borders. This means that a border can appear from the top-left to the lower-right corners of a cell, or from the top-right to the lower-left. To take advantage of diagonal borders, follow these steps:

  1. Select the cell you want to have the diagonal border.
  2. Display the Home tab of the ribbon.
  3. Click the Format tool (in the Cells group) and then click Format Cells. Excel displays the Format Cells dialog box.
  4. Make sure the Border tab is selected. (See Figure 1.)
  5. Figure 1. The Border tab of the Format Cells dialog box.

  6. At the bottom left and right corners of the Preview area of the dialog box you should see buttons that have diagonal lines on them. Click the line that represents the type of diagonal border you want to use.
  7. Click on OK.

Diagonal borders can only be applied to cells, not to rectangular areas you select onscreen. For instance, if you choose cells A5:C12, the diagonal border won't go from the top-left corner of cell A5 to the bottom-right corner of cell C12. Instead, it is applied to the individual cells within the selected range.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (6152) applies to Microsoft Excel 2007, 2010, and 2013. You can find a version of this tip for the older menu interface of Excel here: Adding Diagonal Borders.

Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company. ...

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