To add a fillet top frame

From the Parametric Frame Builder dialog, select Add Frame from the Action list box.
Choose Door from the Type option menu.
Select the Fillet Top shape. The frame is inscribed in a rectangle. The width and the height of the rectangle are the Width and Height set with the Dimensions action.

Fillet shaped frame: (1) Variable height; (2) Fillet; (3) Radius; (4) Height; (5) Width.

can set the side on which the fillet is located.

can modify the fillet top of the frame by defining a value for two of the three variables: Radius, Fillet, Height.