How to Make a Thicker Bottom Border in Microsoft Excel

Microsoft Excel displays a series of gridlines by default which let you see the boundaries of your cells. But these gridlines won’t print by default, and they may not be as pronounced, or they may not be the right color when you do set them to print.

Adding borders to your cells gives you more control over the appearance of your cell boundaries. You can apply borders on any of your cell sides, and you can choose the color for the borders.

But you might have a series of cells with borders where you would like the bottom border to be thicker than the rest of them. Fortunately you can make a thicker bottom border in Excel by using the steps outlined below.

How to Make a Thicker Bottom Cell Border in Excel

The steps in this article were performed in the desktop version of Microsoft Excel for Office 365, but will also work in most other versions of Excel as well.

Step 1: Open your file in Excel.

Step 2: Select the cells to which you would like to apply a thicker bottom border.

select the cells

Step 3: Choose the Home tab at the top of the window.

click the Home tab

Step 4: Click the down arrow to the right of the Border button in the Font section of the ribbon.

click the arrow next to the Border button

Step 5: Select the Thick Bottom Border option.

how to add a thick bottom border in Excel

Note that Excel will only apply this thicker bottom border to the bottom-most row of selected cells.

Additionally, if you choose the Thick Bottom Border option on a cell that doesn’t have an existing border, then Excel will only add that thick bottom border. It won’t add the rest of the borders on the other sides of the cell.

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