I think these are in the font already.

The gamma and lowercase delta already are. They just aren't accessible by regular means. However there are some programs floating around on ticalc that give you access to them. For the upside down uppercase delta, there is no way to add this to the calc unless you were to use sprites.

YEah I am sure there are chars programs on ticalc which you could launch on a CSE to have all extra chars. Make sure the program is from the last decade, so it also has OS 1.15+ chars.


Else, I think MicrOS intended to allow custom fonts, but I don't know if creating 84+CSE fonts is possible.