I have the NSX 46 and OTA. I can use Guide to get program listing, select a different channel etc. But it appears the remote control does not have a Previous button to jump back to the previously selected channel. The Last button acts like Escape, not as Previous. When I press the Menu button, there is a Last option, which acts just like the Last button, so that's redundantly useless. There is also a "Menu" option under the "Menu" menu that acts as an Exit or Cancel button, which is triply redundant and quadruply useless. Any help or tips on how to jump back and forth between two non-adjacent channels would be appreciated!