Statistics：Real-time display of how many particles are in each layer of the stage
Switch Wireframe：When on, render the rectangular wireframe of the particle element
Switch Anchor：When on, render the anchor point of the particle element (red cross), and the line from the anchor point to the center of the particle (green line)
Pause / Continue：Freeze the particles in the stage and click again to continue playing
Playback speed：Particle playback speed during preview, you can reduce the speed to see the details, not affected when running the game
Stage Zoom：From left to right, the five scaling levels are 25%, 50%, 100%, 200% and 400%.
