However, for our example, we’ll add different text. For the first page of your spreadsheet, you may want to leave the header blank, which is the default. The “Header” tab is where you specify the header for all the pages after the first page, which, in our example, is the page number and the total number of pages. Once you’ve turned on the “Different first page” option, you can customize the header for the first page of the spreadsheet and the header for the rest of the pages.