Mindnode boasts "nearly all interactions can be performed very easily with the keyboard". I've been looking for the keybindings and I can't find them. How do you use Mindnode from the keyboard?
I think Jeanne's answer pretty enough according your question. Also I want to add there are PDF version of this shortcuts. And there is a video named 11 Mindnode Secrets Every Mind Mapper Should Know from Youtube.
FYI, there is a list called List of mind-mapping software