I'm new to Fastkeys so I may be wrong but doesn't it need an "always on top" feature? (nope, this is not a sexual preference but a software to lock windows

I mean are we supposed to remember all of our text expander strings?

Maybe FastKeys has this already and I've missed it but assuming there isn't one, there is a very simple software actually called "Always on Top" that you can try out to see what I'm after.
Regards