How do I add functions to a tabstrip?

[Highspeedkiwis Studios]

I have ppt 2016 and I was wondering how to add items to a tabstrip. I guess the answer is very simple, but despite this I haven't a clue, and scouting the net would not give me a hint. Any ideas? When I try the objects do not move when I switch tabs and simply sit there. I use VBA.