I was looking in the help for keyboard shortcuts. E.g. in the RPM mode i'd like to be able to DROP and SWAP by keyboard. Unfortunately i did not find a section in the docs at all, explaining the keyboard. There are some snippets describing some aspects but there seems not to be an overview.
I am moving this to the "feature request" tracker. Feel free to contribute to the documentation.
By the way, the original developer is no longer active, and so the current developers/maintainers probably do not know the keyboard shortcuts either! If shortcuts exist, someone will need to determine them by browsing the source code.