It's going to take some work to come up with a test file for this problem (since the font is not publically available), but let me describe it anyway:
Silly me, coming up with an example is the most trivial thing, since only the size and not the typeface is the relevant issue: \starttext Thus, I came to the conclusion that the designer of a new system must not only be the implementer and first large||scale user; {\tfb the designer should also write the first user manual}. The separation of any of these four components would have hurt \TeX\ significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. \stoptext The {\tfb} line has more interlinespacing of course. Is there a way I can force ConTeXt to reduce the interline spacing of the {\tfb } insert so that all the lines are even (even if the insertion overlaps the main text)? My own insertions are in terms of \start\stop environments so presumably the same solution will apply there. There are some cases where this will look much nicer. Thnx in advance Idris