How to root galaxy 6s to remove gallary

[AC Question]

Want to use quickpic but gallary keeps coming up in all apps.. tried to change setting..but not allowing.

 

[belodion]

I don't use Samsungs myself, but nevertheless I can't see why a user would wish to remove the stock Gallery app in favour of a third-party app. Is it that bad? Still, you could try Reset App Preferences or Reset Defaults.