Use computer/browser to log into your xfinity account and then TV/DVR via the web page under that "TV icon" thing to find full DVR controls. Sorry I cannot point you more directly at it, I am terrible at operating GUIs correctly and prefer CLI like my bro RMS (Stallman). Browser should allow you to get to a page where you can use mouse/trackball/GUI to that DVR stuff. ps - trivia - the recordings aren't owned by the customer they are owned by comcast and they don't actually exist as separate/individual entities. The recordings are constructed on-the-fly via tiny stored "index entries". If you want to own your recordings you can buy your own physical DVR setup including monster disk storage.
