Map "Store EFB copies to texture only" to a button

[Lucbl1]

The question is rather simple, but I don't know if there's a present solution to this. Let me clarify: on Metroid Prime 2, if I enable "Store EFB copies to texture only" the game runs a lot better but the scan visor doesn't work, so I have to keep going to the menu to change it between on and off.

I'd like to know if I could map a button, say, R3 to toggle between on and off of this config? (I use a gamesir x2 BTW)

Thanks in advance

[JosJuice]

This currently isn't possible in the Android version of Dolphin.