I have a cable box, and since it came with a remote I now have one remote (The new one which controls the cable box) for channels, and my old remote for volume/mute. How do I make it to where the new remote (The one with the cable box) controls both volume and channel?
My cable box remote functions as a universal remote and will handle both the channels on the cable box and the volume on the TV. Check the users manual for your cable box and remote.
IF IF IF the cable box remote is a type of Universal remote (most are) you can program the remote to also control the TV set. The manual for the cable box / remote will contain the instructions and the TV codes needed to make it work for your brand or TV set. You did not mention make or model of the box, remote or TV set so if you don't have the manual you will have to go online to the cable box /remote makers site and download the instructions look for the make of your TV set and program in the correct codes.
