Add Cell Borders You can add lines in Excel between cells, using the built-in cell border feature. To do so, select the cell or cells where you want to add borders.

To change Gridline color in Excel, use Excel Options, apply a custom-colored border to the cells, or apply a custom line color. Full details here.

If you want to add a prefix & suffix to a range of cells in Microsoft Excel or Excel Online, then this article will show you how to do it.