: For example, it's not quite clear what I'd need to do to allow
: proportional text; there are all sorts of routines which seem to want
: to be able to move to particular character positions on the screen, or
: want to be able to overwrite characters with spaces. I'm sure it can
: be done, because Bryan Scattergood's ITF ports do it correctly (at
: least most of the time), but it's not obvious to me.