Hide empty bars
I am writing a piece for SATB and piano, the first few bars are only piano and I want to hide the bars from the voices until they start. I tried editing the style, by ticking the "hide empty bars" box but then it hides ALL the empty bars in the score. I want to save space at the start of the score because in some pieces they are too long, and that's 2-3 pages lost for no reason, plus, it's not useful for the pianist. How can I hide only the first choral bars and save space?