Use all width of screen with conent

Hello,
I have noiced that even if I don't have any module in inset or sidebar module positions the content doesnt use the empty space of those positions.
Is there a way to have all width except if in a page I have publish a module in inset position or sidebar position?

Hi

Please tell me the url to the page You have this problem with.

Ok I found the problem.
It was a module in that position which somehow was enabled but showed nothing and just use the sidebar space.
Thanks anyway

Hi

Ok, great to hear it's sorted. Closing this thread now.