The reference member can hold the Snap of the Vertex and Edge of the member during rebar construction, but the member has no dependency with the rebar.

Create from Original Object : Create a plane from the original object of the target member and then enter Draw Mode. The rebars are created on the original object of the target member.

Create from Result Object : Create a plane for the target member's result object and enter Draw Mode. The rebars are created on the target member's result object.