You can create a sloped surface by changing properties of its boundary lines.
You can use this method for the following elements:

 and the pitch
 and the pitch 
	  , 
	 specify properties for a single sketch line. 
	 Revit calculates the position of the opposite edge of the sloped surface.
, 
	 specify properties for a single sketch line. 
	 Revit calculates the position of the opposite edge of the sloped surface. 
   and upper edge
and upper edge 
	  of the sloped surface, but not its pitch
 of the sloped surface, but not its pitch 
	  , 
	 specify properties for parallel sketch lines. 
	 Revit calculates the pitch.
, 
	 specify properties for parallel sketch lines. 
	 Revit calculates the pitch.