To show and hide an Excel worksheet's gridlines, check or uncheck the "Gridlines" checkbox in the Show group of the View tab ...

To create a dropdown list, select the cell or range of cells where you want a value to appear. Then, click the “Format” ...

Excel even makes it easy to find - Conditional Formatting options are front and center on the Home tab. So, if you think your spreadsheets look a little boring, or if you just want to add a little ...