Rules like "Always stand to the left of the screen," "Never cross the beam of the projector," and "Remain detached during the presentation."
ກົດລະບຽບເຊັ່ນ: "ສະເຫມີຢືນທາງດ້ານຊ້າຍຂອງຫນ້າຈໍໄດ້," "ບໍ່ເຄີຍຂ້າມ beam ຂອງ projector ໄດ້," ແລະ "ຍັງຄົງແຍກລະຫວ່າງການນໍາສະເຫນີ."