Manually adjust system spacing

Please help!
I have to believe there's a way to manually alter the spacing between systems. Mostly, automatic placement is fine. But in a few places I've added "extra" notation to the score; for example: Coda, Verses, Chorus, etc.

For these infrequent occasions I want just a little more space between the system where the Coda starts and the preceding system -- but I cannot find where/how to do this.

Does anyone know?

Thank you,
~Rich