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.

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 result of a calculation. Borders can be ...

How to Apply an Outside Border in Excel. Microsoft Excel is used as a business "table and presentation" tool at least as often as it is used to perform calculations, in part because its data entry ...

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 ...