F4 equivalent in Office for Mac
I have historically used F4 to repeat commands in MSWord and PPT, etc. Is there an equivalent in Office for Mac? For example, I will highlight a paragraph of text, then move to another sentence or paragraph and select it and hit F4 and it will repeat the last command. I looked up shortcuts for "repeat" and it's not the same thing, I think it's more like "redo" as in "redo/undo." Anyway, any help would be appreciated. For the most part it hasn't been too painful to get used to the differences with this version of MSOffice. But this is one of a few that is really annoying me mostly because I'm generally fairly adept at figuring stuff like this out on my own :-P
Sorry if I'm on the wrong board here...newbie alert
Thanks
MacBook Air, OS X Yosemite (10.10.3)