If I had a chord on beat 4 in a mesure which has already a chord on beat 1 and 3. (A long one like C7b9) It makes an overlapping in the next mesure. It's ok for the playing but hideous on display. What can I do ?

By the way ; Is there a way to change the number of mesure by line ? a way to change the font size ?

Thank you for your clever answer