Linux Mint/Mate Panel on second monitor

Not obvious. I flailed around for a bit until I found this forum post on how to move a mate panel to the second monitor.

Copying the text from that link:

1. Right-click the panel you wish to move and select “Properties”.
2. Uncheck the “Expand” option under the “General” tab.
3. Grab one of the edges of the panel by clicking on the left or right end (top or bottom end for vertical panels).
4. Drag the bar to the desired screen and position.
5. Check the “Expand” option in the “Panel Properties” window and click “Close”.