(What is the plural? Not anacrusises; perhaps anacruses? - I don't know Greek.)
Anyway, to the point:
1) How do you make the next section start with an anacrusis? I usually end up with filling a bar with an unusual number of rests.
2) I don't seem to be able to use the function that makes a linebreak every 4 (or other number bars) because the program apparently counts the anacrusis as the first bar. I'm only making these breaks for aesthetic reasons, anyway, so the music is evenly spread out and easy to read and a short bar usually fits in.