Actually, thats also a good idea, to have the option at the bottom
As stated here (or below), the different "styles" are just color changes. In the options you chose a different color.
Quote:
Originally Posted by Princeton
New Style
The first thing you probably have noticed is the new style. The unique thing about this style is its flexibility.
Please go to your profile options page and you will find an array of options for the style:
Choose your Design: You can choose a different design ... currently, it's only a color change but new designs will be available soon.
Default Style Width: Not a fan of of the fixed width? Well change this option to switch the style's width to a fluid layout.
Thread Listing Color Status: This option allows you to color code threadbits based on specific status of the thread: Posted, Popular, Closed, etc...etc...