44 | Twenty Eleven – Sidebar on Single Posts and Pages

How to add the sidebar back into the new default theme of WP3.2 – Twenty Eleven.
Twenty Eleven is a very versatile theme, however, the ‘missing’ sidebar on single posts or pages is quite disturbing for some users, loosing their advertising space or the main navigation.
To get the sidebar back is not that simple – style.css is quite complex, and the layout of a single post or page is done with a clever use of a specially introduced css class in the body tag. Check the whole post