I have described this concept in the FL forum: https://forum.fontlab.com/fontlab-8/poportionally-harmonise-control-handles-to-master/ Perhaps this is functionality that could work within TR?
I have described this concept in the FL forum:
https://forum.fontlab.com/fontlab-8/poportionally-harmonise-control-handles-to-master/
Perhaps this is functionality that could work within TR?