🚀 go-pugleaf

Maybe you could get what you want by adding extra choices to the "balance ragged lines" option. You could specify a zone from the margin within which you want your line endings to fall, and an "allow varying word/letter spacing" option to allow ID to achieve this. I gather the "balance ragged lines" does what you want, apart from the increased margin that may result from its use. I don't think I'd use it (just like I don't use letterspacing or glyph scaling to justify text), but I'm all for giving the user more options. (For example, it's a little thing, but I'm glad that ID does pay attention to the desired word spacing setting in fully justified text - some apps don't.)