How do you expose GroupHeaders and GroupFooters in a Report? - sorry, found it!

Hi, I have had a look at some of the sample xojo apps using reports, and they use GroupHeader and Group Footers. When I have created a report, no matter how hard I try I cannot seem to get them to appear. All I manage to do is resize either the body or the header or footer. I can’t even find out about them in the Docs.

I have managed to find it, by just clicking everything.