A Table Edge has two End-Points but unlike tracks they can not be connected. They can be moved by the Modify command to change the length or position of the Table Edge.
To create a Table Edge, select the first End-Point and drag to place the second End-Point. If either End-Point is close to another Table Edge End-Point it will be moved so they are at the same position.
Table Edges can be Modified to reposition their End-Points.
The size of the room is set in the Setup dialog. Room borders are drawn on the layout.