Is it possible to have ONLY the prefix (not followed by the corresponding page number) with this implementation? If not, is that a feature that can also be added?

I tried to create a custom label called "viewercustom" (which operates like "viewerprefix" but omits the userpage counter value), but I have been unsuccessful . I modified the following four files (which were the only files that I could find containing "viewerprefix")

./tex/texmf-context/tex/context/base/strc-pag.mkiv
./tex/texmf-context/tex/context/base/strc-pag.lua
./tex/texmf-context/tex/context/base/mult-def.mkiv
./tex/texmf-context/tex/context/base/lpdf-mis.lua

Is there something else that needs to be modified that I am missing?

Troy