Setting a header or a footer
To set a header or footer:
Navigate to the sheet that you want to set the header or footer for.
Select Format > Page.
Select the header (or footer) tab. You should see Figure 87.
Select the Header on checkbox.
From here you can also set the margins, the spacing, and height for the header or footer. You can check the AutoFit height box to have the height of the header or footer automatically adjust.