Use the Projected to item to create a surface plane that is parallel to the XY plane of the active Workplane. The plane has a Z height equal to the highest point of the Boundary.
To project a plane click Model tab > Create panel > Projected.
Use the Projected to item to create a surface plane that is parallel to the XY plane of the active Workplane. The plane has a Z height equal to the highest point of the Boundary.
To project a plane click Model tab > Create panel > Projected.