PDF Export enhancement

[petersjacky]

Like in printing mode, i aim to have the possibility to export from a score, for example, page 3 to 8. I use PDF tools for that and PAO softwares or text editing have this feature. (Coming from https://musescore.org/en/node/394397#comment-1331599 from the Muscorescore studio forum).
Thank You. I'm not sure if I'm in the right place for asking.