If you are responsible for putting together an Excel document for your company, there is a great way to spruce it up: add the company logo to the header or footer. It's very easy to do and in the end it may impress your boss too.
Open the Excel document that you want to add the logo or picture to.
Click Insert and select Header & Footer from the Text group.
Click inside the header or footer where you wish the picture to appear.
Click Picture under Header & Footer Tools in the Header & Footer Elements group on the Design tab.
Select your picture and click "Insert." The picture will appear where you clicked.