Gridlines are faint lines that appear on an Excel spreadsheet to help you line up data and make it easier to read. To add gridlines to your spreadsheet:
1. Open the spreadsheet you want to gridline.
2. Click on the "View" tab in the ribbon at the top of the screen.
3. Click on the "Gridlines" checkbox in the "Show" section of the ribbon.
4. Click on the "OK" button.
Now your spreadsheet should have gridlines on it.