[fjordaan]

Sorry, when I referred to Master Canvases in my post I actually meant Shared Layers. I use those lot, but they're not really a substitute. As I mentioned, I can use them for a page header, but only because that always stays in the same place.

Named styles would be nice, but it's not a feature I'm desperate for. It also doesn't solve the same problem.

So yes, it's Master Objects I'm after. A cloned object (which could consist of any number of drawing elements) that, when edited, updates all other instances of that object.