If you want to add a header or footer to all sheets, select every sheet by right-clicking one of the sheet tabs at the bottom of the Excel screen and clicking "Select All Sheets" in the pop-up menu.

Microsoft's Excel spreadsheet program contains many features that enable you to create comprehensive and detailed documents. You may use tools to perform tasks similar to other Office productivity ...

Q: I read your colleague David Einstein's description of how to make row and column headings repeat on each page of an Excel spreadsheet in Windows. The Mac version appears to be just a bit different, ...