In the past there was a free tool available from
but now this tool is part of VectorWorks.
If you select something that you want to move or copy....
Click at the first point that you want to use.
Click at the second point.
VectorWorks will then move (or copy depending on the settings you choose) the object from its current location to the new location.
The new location will be the relative distance from the first click to the second click.