Transfers the selected part(s) to a new or existing assembly. You can only select parts within a single assembly for transfer. If you select parts from more than one assembly, the command becomes disabled.
The command is not available when you in-place activate into a subassembly.
Note:
If you transfer a part that occurs more than once in the source assembly, there could be a reduction in the part count for the assembly. Likewise, if you transfer a part to a subassembly that occurs more than once, there could be an increase in part count for the assembly.