There are a few ways to insert a footer in Excel. The easiest way is to go to the View tab and select Header and Footer. This will open up the Header and Footer toolbar. From there, you can select the different types of footers to insert. You can also insert a footer by going to the Page Layout tab and selecting Footer. This will open up the Footer toolbar. You can also insert a footer by typing in the following code into the Formula Bar: =Footer().