so? what about themes?

maybe i have to read more documentation, but.

I was just trying to install a new theme and what? i have just the option to overwrite the default view????

i'm sure there must be another solution for an advanced social platform like that... i just would like to create a new folder maybe inside the view one.. and choose this theme via admin panel.. quite all cms i ever user (a lot) makes like that...
there is a simplest way then overwrite view/default ??

i know i'm newbi in elgg, but i have big experience with all cms and this problems i thought i will not have with elgg...