qmk had this, but basically if my up arrow is a mod tap for shift, by double tapping it in a specific window, it will act as a hold key for up arrow! this would be super useful for arrow mod taps so you dont constantly have to tap the arrows! (also useful for those of us who bind the esc key to a mod tap for ` that way we can still hold esc in the rare event we need to skip a cutscene or smth, without having to activate a seperate layer for that!)
this is one of the biggest things i think the wooting keyboards are missing ngl, without it mod taps are significantly worse!
