Press Q, W, E, R, T, or Y to select particles to use. Place particles on the surface by clicking. Press 1, 2, and 3 to select tools. Different tools interact differently with different particles. Press space to hide/show tool and particle lists. Press Z to stamp everything, X to clear stamps. Press M to toggle placing particles stationary and moving. If stationary placement is on, you must click once to place each particle. Switch tool to clear, then click to clear all particles.
Everything by me.
