Manages the working set of objects that are edited in a reference.
The following options are displayed.
Adds objects to the current working set while editing an xref or a block definition in-place. (REFSET command)
Removes objects from the current working set while editing an xref or a block definition in-place. (REFSET command)
Discards the changes made to an xref or a block definition. (REFCLOSE command)
Saves back the changes made to an xref or a block definition. (REFCLOSE command)