The new Up to Edge and Merge option in the Edge Flange Property Manager connects two parallel edges in a multibody part. The edges must be the same thickness, part of the sheet metal part base, and must belong to different bodies. The option is available if you select a single edge under Flange Parameters.
The Up to Edge and Merge option calculates the angle between the edges automatically. You can unlock
the angle to override the calculation to extend or shorten the connecting flange.
To merge the sheet metal bodies in corner_multipart.sldprt: