Configuring a full, Edge-to-Edge Drop Down Mega Menu

1. First, select the parent level menu item you wish to configure.
2. Next, set your columns. There is already a single column, so you want to select the 2nd level menu item where column two should begin, then click the right arrow button under Break column. 
   1.  Repeat this step for each item that will be a column header.

Note: TB config columns do not adjust on their own. To increase the width of the columns, select the open space  within the drop down and add a Submenu width. See the image below for an example of where to click in the open space to view the Submenu Configuration to make this adjustment.