Isn't that what the side buttons are for?

The backward and forward apply only to the page you were previously on regardless of device...like the back button on your web browser. The only way to do it is manually, there is no automated command. Basically, if you are on "Cable -1" and wanted to make a NEXT button, you would have to simply enter the action "Jump to Cable - 2". Then on the Cable 2 page you would create a back button with the action "jump to cable 1" and a next button with the action "jump to cable 3". You'd have to do that for every page in every device. I did it when I had my channel logo pages so that I could scroll through all of my channels. It is a pain but it is the only way I know to do it.