I can't really understand what the manual is saying about this, but it looks like you use the DVD/VCR key as a multi-function key, for either a VCR, DVD, or receiver, but from what I read you can only program one of those devices to that key. So if you program it for your receiver, you can't also program it for a VCR and/or a DVD.

There is no volume punch-through function available, so if you want to use the receiver's volume and muting controls, you would have to press the VCR/DVD button first, and then go back to TV to control your TV.

Original equipment TV remotes are well known for their lack of versatility.