That is correct, because you are actually creating a single shape from the
union of others, and then they are deleted.
If you want it to be reversible later, then you have to use the Group
command

"Mike Walter" mike.walter-nospam-at.handera.com wrote in message
...
Is there a method to "un-unite" a shape. Once I've united a couple shapes
I
can not seem to un-unite them without using Edit-undo.

Thanks,