One of the nice things about Editor is that all the menu items and functions available through the UI (and some that aren't) are accessible through an extensive API. While not part of the API, the same openness of application can be leveraged to use pre-defined shortcut keys — and to create your own.
In 2013, a customer who was very key-stroke oriented, created a cheat sheet of shortcut keys. It's a pretty safe bet that most of these are still good. They don't change release to release and have been a part of Arbortext since the beginning. I haven't tested them. I'm not a shortcut key person. I'm a mouser.