Originally Posted by schwa
The feature request is just to be able to reverse the ~beam~ stem direction for individual notes without assigning them a voice
I have edited my original post in the hope to clarify things.
The beam direction of a single note (default voice) sticks out. eg all are pointing down, but only one isn't because it is too low. This may not look pleaseant depending on taste.
The beam direction of a single note (high voice) extends very much above the staff. If the low voice is low enough the beam of the high voice could point downwards without collision. Again this is a matter of aesthetics.
PS: I have noticed that Reaper's idea of what a voice is may be different to my own view. Besides from sheet music my idea stems from using engraving software. They have no special "default voice", nor a high or low voice. They simply number the voices starting from 1.
IMHO importing and exporting scores by MusicXML would be much easier if Reaper would stick to that convention, ie default voice is #1, the next one #2, etc.