Not long ago we found a workflow that demonstrated how convenient it would be to be able to copy a representation class. The situation arose as we were creating a map service for a map that had been designed for print. The problem was that many of the symbols were too small and detailed to be seen clearly on screen. Our symbols were already cartographic representations, so we didn't want to edit them (to make them larger) because we still needed them to produce our print map. We also didn't want to have to create and manage an extra copy of our data just to manage one additional attribute (the one added for representations).

After a bit of head scratching, documentation searching, and interface exploration, our persistence paid off. We had at one point right clicked on our layer and noticed that the choice to convert our symbology to representation was still active. What's more, when we used this choice, it worked! It made a copy of our representations for the print map. That saved us hours of work, by having to edit only one property (size) of only some of the symbols our layer used.

One additional thing we learned in the process was that not only did our point layers need to be updated, but our fill layers that used representation markers also needed to be updated.