Important Note: The contents of this document applies ONLY to version 5.x.x of Simple:Press. It likely does NOT apply to version 6.x.x (our latest version).
The Administration Themes section is where you can choose which installed theme and overlay that the forum is to use.
You can choose from the available regular themes and also a mobile theme. This section also gives you the ability to upload a new Simple:Press theme or edit an existing one.