To create your own custom 10' X 10' display, click on any of the shapes. They represent the following components:

S: single pedestal or single display case
D: double pedestal or double display case
B: bridge pedestal which could or could not have a display case on it.

Click on each desired shape and then drag it from the center to another position. When you click on a shape in the grid, a small dot appears in the corner. You can click and drag this to rotate the component. Have fun!