Looking for feature I can't remember

I remember vaguely that in a very old version (3 or 4) CorelDRAW had a feature which allowed me to duplicate an object in such a way that any change I made to one of them the other would reflect that change.

It was soooo long ago that I can't remember the feature's name... and even if it was actually in CorelDRAW, I might be confusing it with other program.

Any idea? TIA.