By that I mean changing the in-game aiming mode, not the device. Let's say I'm using mouse and keyboard and in Nines and AK's I go to Options -> Controller Setup -> Configuration and change it from "Mouse + Keys" to "Joypad" while still using mouse and keyboard so I can shoot the bottles with auto aim and cycle between them using the Next/Prev Weapon keys, then change it back to "Mouse + Keys" after the shooting part is over.

I can see a few spots where this can be useful and save a few seconds but before I actually start using this myself I'd like to know if this is allowed or not.

It may sound like a dumb question but I always had that doubt since I started learning Any%