This settings page shows a special interface that will allow you to rearrange the categories in the sidebars. Each selection box represents the sidebar on the same side as it. There are extra categories listed here that won't be on the actual sidebars by default, these will appear when you join a clan.

You can change the order of a sidebar by selecting one or more categories then clicking the up and down arrows next to the box until it's the way you like it.

You can move categories to the other side either by double-clicking a category or by selecting one or more categories and clicking the left or right arrows.

You will notice as you move the categories around the actual sidebars will be rearranged to match. If you wish to disable this behavior, uncheck the Show Preview box.

You can also hide the Next Data Update timer here, you can easily view it after saving by clicking on it.

After saving, if the page you are on is not in a category on one side, the first category with a menu on that side will be opened by default. If you leave a sidebar empty it will disappear completely, except on the Sidebar settings page.