I have just installed Twenty Twelve as Magazine Basic is doing funny things with my image map. But there is GUI to modify the layout of the page. So I had to delve into the dreaded CSS stylesheet!
Fortunately moving the sidebar to the left is easy in the TwentyTwelve theme. Here’s how you do it:
- Go to the theme editor, from Appearance > Editor select Style.css at the bottom (it is usually auto-selected).
- Find the .site-content and .widget-area lines of CSS
- Change the .site-content to float: right;
- Change the .widget-area to float:left
- Save it. Hey presto!
This will probably work in many other themes too.