Use this procedure to create a door/window assembly based on a 2D layout grid. If you already have 2D layout grids in a drawing, you can easily convert them to door/window assemblies. Or, if you are already familiar with layout grids, it is an efficient way to create a door/window assembly and then experiment with the door/window assembly commands to learn more about them.
When you create a door/window assembly from a 2D layout grid, you also create a new door/window assembly style. The divisions in the new door/window assembly style are taken from the divisions in the layout grid.
(You may have to scroll to display the desired tool.)
Layout Grid. 
If necessary, edit the properties of the door/window assembly in the Properties palette.