Module Variations

Module Variations or Module Hilites are a facility to individually style each module within a position, without it being global. Code wise, this is achieved by adding a class into the module code which loads from the Module Class Suffix field in the Module Manager. The theme CSS then adjusts the styling to the prebuilt suffixes.

Enter any available suffixes at Extensions → Module Manager → Module → Module Class Suffix

Inactive Module

You should publish modules to the "inactive" position and set the Menus to "All", for them to show up on pages where there is no active menu ID. This is a bug/feature of Joomla that causes only menu items in the "All" setting to show up.