Software like powerpoint, illustrator, etc allow you to move objects forward and backward between layers. Presently, both use ctrl+[ for backwards and ctrl+] for forwards. Holding shift modifies them to move all the way backwards ( ctrl+{ ) and all the way to the foreground ( ctrl+} ). The functionality already exists via the right click context menu under the arrange option, so I'd imagine it would not be challenging to implement. It would make life so much easier needing to rely on the dropdown a layer deep in the right click menu every time.