How can I split up the navbar or make it wrap to another line if it is too long?
Currently, you cannot break a navbar into more than one section or cause it to wrap to another line. There are three possibilities: you can make adjustments to the navbars text or images so that the single bar will fit into the desired location; you can choose to create your own custom navigation bar; or you can choose to get the LinkMaster component now available from Coolmaps, which allows you to control these type of changes.
