The context-sensitive menu of commands that is available by right-clicking on a volume or disk in the tree view is also available by right-clicking a subdisk or disk in the Disk View. Additionally, in the separate Disk View window, the context-sensitive commands are available on the Action menu.

Also, in Disk View you can drag and drop subdisks instead of using the Subdisk Move command (if drag and drop is enabled in the general preferences).