How do I format the layout in Sibelius so that there are 4 bars per line on each page? I currently have 7 and it makes the notes too small and squished to read them clearly. How do I make the bars "bigger" so as 4 take up the width of one page? Help!
Layout tab -> Breaks -> Auto breaks. It's normally off by default, but you can enable Auto System Breaks, and then choose to specify the number of bars at which to break off the system.
Click on a barline and press the return key. This will then put this barline at the end of a line. So, if you click on the 4th barline of the first line, and then press return, it will move bar 5 to the next line. Repeat this for all subsequent lines.