In the Form contextual environment, the Plane command creates a T-Spline plane in Fusion.
The Plane dialog defines the attributes and location of a plane.
Design > Form > Create > Plane
Select to create a center rectangle or a two point rectangle.
Specifies the distance in the length direction.
Specifies the number of faces in the length direction.
Specifies the distance in the width direction.
Specifies the number of faces in the width direction.
Select Mirror to embed symmetry.
Specifies the effect the operation has on the design.