you can make bulids and save them so if you press hero and go to bulids section you can see all the bulids you save and press them to copy what your traits are and weapons/armour(if there in your inventory) i play an ele sometimes in wvw i wanna switch to an s/d bulid then switch to an healing ele for dungeons or etc. ALSO you can not bulid switch in combat and when you bulid switch it has an 1 min CD( to prevent exploits) for wvw make it have an 3 m cooldown if you have been in combat so you can’t just switch for an 1v1 kit if you see anouther person comming) and in spvp( make it they can only bulid swap in heart of the mists)
sorry for bad English not my first language, bye!