2D particle collisions in Unity 5.3

The new version added support for particle collisions in both 2D and 3D. I’m currently working on a 2D game, and i can’t quite figure out how to use it. I feel like I’m missing something obvious.

Nevermind, i was missing something obvious. I just found out you can click on all the checkboxes to open up more options. The second option in “Collision” is “Collision mode”. Click that one and change it to 2D.
I should get more sleep.