Cpanel Themes are the graphical skin of the CPanel hosting account control panel . CPanel has many pre-installed themes and is default to one standard theme:
CPanel X, it has a front page panel that lists out all of the available hosting account control functions. This Cpanel X theme uses quite a lot of graphics and it takes a while to load on a slow internet connection.
Your website hosting provider may allow you to change between different cpanel themes or restrict to just the standard theme. This cpanel guide is written using the CPanel X theme as a reference.
There are many hosting providers that offers a customize version of their own Cpanel themes, it can be a simple change of the font type and different background color or a more complex customization like rearranging the entire CPanel theme layout. You may have difficulties finding needed information quickly in this guide if you are using a heavily customized CPanel theme - you may need to refer back to your hosting provider for help.