When you want to remove the gridlines from your Microsoft Excel worksheet, update the page layout. Your worksheet options include removing these vertical and horizontal guides from view and also ...

Remove Spreadsheet Gridlines By default, Excel displays gridlines, faint lines that define the borders around individual or merged cells.

How do I customize the grid in Excel? To customize the gridlines in your Excel worksheet, you can change their color, apply borders to them, or apply a fill color to selected cells.