FAQ: Adding more space between staves
Click on the staff you want to add more space around. Press F2 to bring up the Staff Properties dialog box. Under the Visual tab, use the Upper Boundary and Lower Boundary settings. Increasing the Upper setting provides more space above the staff. Increasing the Lower setting gives more space below the staff. Do this for any staves you need more space around.
You can also use a Boundary Change instruction to dynamically control the vertical staff boundaries from within the staff.