To add a Border to one or more Cells in Microsoft Excel, open the spreadsheet, select the Cells, click on the Borders button and take it from there.

How to Add a Border by Clicking in Excel. Selected cells in an Excel spreadsheet can be emphasized by adding a border to make them stand out. For instance, you might wish to call attention to the ...

To emphasize your Excel data, you may find that applying borders and increasing line weight helps call attention to the information.

Assuming the cells haven't been formatted to have borders, these "lines" are visible only on screen in Excel are switched off/on from Tools, Options, View menu in Excel. I seem to remember that ...

Learn how to add a highlight to expose groups in your Microsoft Excel data using a helper column and Excel’s conditional formatting feature.