In order to control the power point through the projector remote, you will want to make sure you have connected the projector to the computer through USB in addition to the video cable you're using. You will need a USB-A to USB-B male to male cable in order to do this. Once it is plugged in, the projector should be recognized by the computer as a mouse.
Note: Not all of our projectors support this feature. If you see "Remote Paging Operations" in the products user manual, it is supported. If you're not sure, please just give us a call at 866.600.2367.