Updated for 7.0
Within the left side bar under EVENTS, select Events. This will take you here:
Select the event that you wish to make edits. This will take you here:
In the horizontal bar at the top of the page, select Tables. A drop down will appear. Select Layout. A new tab will appear that looks like this:
To edit the table layout, drag and drop each table into the desired space. This will automatically save your changes within the system.