Use common sketch tools to define the boundaries for a system of fabric sheets covering an area.
Reinforcement panel
(Structural Fabric Area).
Draw panel

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
(Visibility Graphics) and modifying parameters under Structural Fabric Areas or Structural Fabric Reinforcement.
Mode panel

Revit places a fabric reinforcement symbol and tag for each fabric sheet separately.