The Staff Spacing dialog allows you to control the spacing between the selected staff and the staff above it within the same system. To open this dialog, right-click on a staff and select Spacing -> Staff Spacing.

When "Apply to all systems" is ticked, the value applies to the staff across all systems, otherwise applies to the staff on the current system.

Note: For single staff scores, change the spacing between staves using the System Spacing dialog.

Staff Spacing:

This value controls the staff's distance to other elements above it.

Apply to all systems

Checking this box will apply the value to the selected staff across all systems.