Print album (Score & parts) to PDF

I have a long score (25 minutes long) that I split up and notated in 5 separate files, because I found that if I have everything in one file, the app becomes sluggish and not quite usable. A also learned that using an album, I could print all 5 parts together as one continuous score with continuous page and measure numbers.
My current problem: I have to send parts to musicians, so I need to be able to save the album to pdf preserving continuous page and measure numbers. But now I'm finding out that this is not possible?? How do I do this? I need to be able to email them the parts.

Thanks for your support. Otherwise, excellent app!!