How to Remove Extra Unused Cells in Microsoft Excel 2013. Worksheets in Microsoft Excel can contain over a million rows and over 15,000 columns. With a workspace that large, if you're not careful ...

If there are many blank rows in your Excel sheet, you can delete them and tidy up the document using the "Find and Select" feature. Here's how.

Protected and unprotected cells look the same in a spreadsheet. To delete all unprotected cells, you must select all of them at once, which can be easily done by using the Find and Replace feature.