Weblogic has several options for its modules. For the left and right positions you can use up to 5 styles. You can learn more how to apply these styles to your modules here.
Module Style "-bdr"
This module style (-bdr) renders a plain grey background and border for specialty use.
Module Style "-nopad"
This module style (-nopad) is useful for inserting images or other multimedia. As the suffix implies, there is no styling or padding associated with this style. It is also recomended to turn "Show Title" to False.