This example uses a sloped roof that has a gable end and a hip end.

1. Select the roof using the Element Selection tool.

   Notice that a Plus (+) or Minus (–) sign editing glyph appears on each roof edge.

2. Select the Plus (+) glyph on the gable end. The AccuDraw compass appears on the glyph.
   
   
   Enter a Data Point to accept. You can also Reset to reject the selection.

   By accepting the selection, a panel is added to the gable end to create a hip end.

   When Plus (+) glyphs are selected, the default slope (the slope that was used to create the roof) is used when the roof panel is added. Also notice that the Plus (+) glyph changes to a Minus (–) glyph.

3. Now select the Minus (–) glyph on the hip end. Again, the AccuDraw compass appears on the glyph.
   
   
   Enter a Data Point to accept. By accepting the selection, a panel is deleted from the hip end to create a gable end.

   When Minus (–) glyphs are selected, roof panels are deleted or subtracted. The Minus (–) glyph also changes to a Plus (+) glyph.

4. While you are in the mood to modify and manipulate your roof, select ( Insert Vertex ) from the ribbon. Select an edge of the roof where a new vertex needs to be added.
   
   
   Move the pointer to the location where the vertex needs to be placed and enter a data point. The slope of all modified roof panels automatically update.
   Note: The Delete Vertex tool can also be used to delete roof vertices.