I hope that this email finds you well, thank you for reaching out to Rain or Shine Golf. The distance that you mount your projector from your screen depends on the size of your screen. Typically, most customers mount this short throw projector 5′ 6″ to 8′ 6″ away from the screen they are hitting into, depending on the size.

You can use this helpful distance calculator where you can input what projector you are using, this is the Optoma EH200ST, and your screen size and it will provide you with the optimal distance from projector to screen: