On this forum, all users are free to change their user theme. Essentially, the theme contains all colors, design, and text/feature placement that wraps around the main PHP code that makes this forum work. It describes how the forum will look to you.
To change the theme, users should simply click on
Profile at the top of the page showing their profile and the options associated with it on the right side of the page. Upon clicking on the "Look and Layout Preferences" link, you should see at the top of the page:
Current Theme: [your current theme].
Simply click
(change), and select the layout that you wish to use.
If you are having trouble with this process, start a thread in the
Technical Forum about it.
Also, if you are experienced with php, css, and the SMF forum software, and would enjoy creating a new theme option for the users here, feel free to PM an "Editor".