Through the use of a different template you can give your pages a completely new look. There are thousands of templates available for CMSimple_XH, most of them are free (at least for private use).
You can have practically any look for your website, and only after seeing the source code a visitor may recognise your site as powered by CMSimple. We prefer that a small link "powered by CMSimple_XH" links back to us, but this is not mandatory.
To give you an idea of what templates can do we installed the template switcher plugin, whose option list you see above the content area. Please have a try at it.