Excel for Mac has received a new update for Insider Slow Ring.With the latest update, you can now insert and format pictures in headers and footers.
This is the one of the top requested feature. The latest update version is 15.36 (170702) or greater.
This is still just for Insiders Slow, but we hope to make it available for everyone soon.
In the latest Insiders Slow update, just go to Print > Page Setup to set custom headers/footers, or go to View > Page Layout View and click in a header or footer field. Then look at the Header & Footer tab on the ribbon. There’s a “Picture” button which lets you insert any picture from your computer or you can format a picture that’s already been added to your header or footer.