For the year and a half I’ve been using Rhino I’ve received and taken at face value the pop-up message “cannot turn on points on for polysurfaces” if I attempt to do so. Today I learned the valuable piece of info that we can edit points on polysurfaces (just not with "PointsOn*/F10) with ctrl-shift and – if it’s a closed polysurface – SolidPtOn. I suppose I’ve missed abundant documentation of those latter two commands, but I thought I’d point out that the combination of that error message and some terminology on the site* may be misleading.
*If I now understand correctly: The reference in the documentation to “Closed Solids” is redundant, right? A “Solid”, “Closed Polysurface”, and “Closed Solid” are synonymous? If so it’d be really helpful if the term “Solid” (or Closed Solid) appears in What right next to “Closed Polysurface”. If so I’d have figured out quite a bit of valuable info a long time ago on the fly.