Most commands are ALT + first letter of command. Very mnemonic.
ALT + L = Mark a LINE ALT + B = Mark a BLOCK ALT + U = UnMark ALT + Z = Mark a Stream (ok, not very mnemonic :-) )
ALT + M = MoveBlock? ALT + C = CopyBlock? ALT + O = OverlayBlock?
ALT + K = Kill a line
Unlike the WordStarKeyboardLayout?, this layout is not based on the QwertyKeyboard location of each key.