Use common sketch tools to define the boundaries for a system of fabric sheets covering an area.
 Reinforcement panel
Reinforcement panel 
  (Structural Fabric Area).
 (Structural Fabric Area).  Draw panel
Draw panel
 (Boundary Line).
 (Boundary Line). 
Using these controls you indicate the fabric sheet alignment and lap-splice values. You should select at least 2 neighboring controls to create a correct fabric sheet layout. The fabric sheet layout adjusts fabric sheets to the fabric boundary. The fabric sheet is cut by the sketched boundary and openings in the host.

 Graphics panel
Graphics panel 
  (Visibility Graphics) and modifying parameters under Structural Fabric Areas or Structural Fabric Reinforcement.
 (Visibility Graphics) and modifying parameters under Structural Fabric Areas or Structural Fabric Reinforcement.  Mode panel
Mode panel
 (Finish Edit Mode).
 (Finish Edit Mode). 
Revit places a fabric reinforcement symbol and tag for each fabric sheet separately.