Select a dormer and click the Open Object 
edit button to open the Dormer Specification dialog.
Specify the Roof Type above this dormer. You can choose from Hip, Gable, Shed, Gambrel, Mansard, Barrel, Curved Eave, Hip Curved Eave or Eyebrow.
Specify the Pitch of the dormer roof planes.
Initially, the default dormer pitch matches the roof pitch for all dormer roof types except Shed, which has a default 3 in 12 pitch. For Gambrel and Mansard types, this applies to the lowest, or eave, roof planes.
Check Pitch in Degrees to display the pitch in degrees.
The Second Pitch specifies the upper roof of a Gambrel, Mansard, curved eave, and hip curved eave. Specify the Distance In from the lower roof plane eave to where the upper roof plane starts.
Plumb or Square cut eaves can be specified for dormer roof planes, as well as Gutters and Boxed Eaves.
Check Include Frieze to include frieze boards on this dormer.
Overhang, Fascia Depth for gable fascia, Eave Fascia Depth and Rafter Depth can also be set.
The Wall Type for the dormer walls is set here.
The Height is measured from where the top of the underlying roof plane meets the dormer front wall exterior to where the underside of the dormer rafter meets the dormer side wall interior.
This top height is called the dormer ceiling height, even if the ceiling in the dormer is not flat. The top dormer window casing is usually close to this height.
Unlike other dormer types, shed dormer height is measured from the same bottom point to where the underside of the dormer rafter meets the dormer front wall interior.
Height to Reach Existing shows the difference between the dormer height where the inside of the wall meets the underside of the roof and the ceiling of the room behind it.
Width is measured between the outside surfaces of the dormer side walls.
Form Room Inside Dormer is used only for floating dormers and creates a flat ceiling in the dormer. If you check this option, you should define the dormer on the floor above the room it is positioned over. If this room has a flat ceiling, checking this option makes a hole in the ceiling under the dormer. This option should normally be left unchecked.
If Set Inside Window Trim Width is checked, the inside casing width for dormer windows defaults to the Inside Window value entered below. Dormer windows can appear too narrow on the outside due to the space required for the inside casing to clear the inside surfaces of the side walls. This value sets the width for the inside casing of the dormer window.
Roof Returns can be specified only for gable dormers. See "Roof Returns".
For information about the Line Style tab, see "Line Style Tab".
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