Epson 503c - Manual (Page 81)

Appendix A: Connecting to Additional Equipment 75
Connecting the Mouse Cable
To use the remote control as a mouse, follow the steps below. You’ll
use a different mouse cable, depending on whether your computer has
a round PS/2 mouse port or a flat USB port.
1. Connect one end of the appropriate mouse cable to the projector’s
Mouse/Com port or the USB port, as shown.
2. Disconnect your mouse from the port on the back of your
computer and replace it with the other end of the cable. (Your
computer’s mouse will be disabled while you are using the remote
contrtol as a mouse.)
connecting PS/2 mouse cable connecting USB mouse cable