I am affiliating with a site and they will push ads to my site -- don't know how yet -- but to enable this I need my right sidebar to be 300 pixels. How do you set pixel width in Atahualpa? I'm using 3.4.5, my site is http://www.decomposingsb.com/

Sidebar width as well as hundreds of other options, can be set if you go to your dashboard and look under Appearance/ Atahualpa Theme Options.

Thank you. I looked but not far down enough.