While viewing the channel hit ok to see the tv listing

1- hit the check mark on the remote to put the receiver in edit mode

2- high lite the channel you want to lock and hit the check button on remote

3- once you have all channels that you want locked checked with a check mark

4- hit the blue button to lock channels then press exit on remote to exit out of the menu

5- to view the locked channels when selecting the channels hit 0000 on the remote to unlock the channel

6- to unlock all the locked channels permanently repeat step 1 threw 4