How to control space between staffs

• Feb 3, 2019 - 10:54

What is the space between staffs in a system called? And how can I control it?
For some reason the staffs are being laid out with a huge amount of space.
Screen Shot 2019-02-03 at 11.52.04.png

I'm attaching the score file.

BTW I'm using version:
OS: macOS High Sierra (10.13), Arch.: x86_64, MuseScore version (64-bit):, revision: 8ca4d2c


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