Hi,
Try this!
edit the following stylesheet:
wp-content/themes/thematic/library/layouts/2c-r-fixed.css
Find the “#container” line, and modify the “width: ” element.
Also the “#content” line specifies the width of the posts inside the “#container”.
This will modifies the size of your main content, where your blog appears.
For the side bar width; find the “.main-aside” entry and modify the “width: ” element again.
The “#main” entry includes the “#container” + “.main-aside”.
I meant you tell you, add to your child theme’s stylesheet (/wp-content/themes/thematic-child/style.css), don’t modify the original files.
🙂
I guess it’s worked then. 😉