I am explaining it quite poorly. It's different from Commander etc because they were (to my mind) essentially WIMP interfaces. You could use them with a keyboar

I am explaining it quite poorly. It's different from Commander etc because they were (to my mind) essentially WIMP interfaces. You could use them with a keyboard, but it wasn't really the paradigm. BBG's terminal is fundamentally still keyboard-driven: you can use the mouse, but in the same way you can use a mouse with emacs: you're going to be driven back to the keyboard sooner or later, so you might as well stay there. There are some introductions on YouTube, but they're all horrible. I'll see if I can find a good one.