Module Variations allow you to individually style a module Enter any available suffixes at Extensions → Module Manager → Module → Module Class Suffix
There are 24 suffixes: title1-6, box1-12; flush, flushtop, flushbottom; plus standardcase, uppercasefa and lowercase.
This is the Popup Module feature. Assign any module to the popup module position, and ensure that the Popup Feature is enabled in the Gantry Administrator.
You can configure its height and width from the Gantry Administrator.