[roger64]

Hi

It seems that, despite some interest about it, this question about subsetting not preserving open type feature variations will stay unresolved.

I note that the Calibre editor issues a warning before sorting the style rules (see attachment-in French sorry).

Maybe, for the time being and as it is not an obvious behaviour, would it be useful to add such a kind of warning before launching the tool "subsetting of included fonts" which replaces existing fonts:

"Are you sure? Subsetting does not preserve open type feature variations."