When in STB mode the "A" button activates Widgets. Within the Widgets, there are various functions dependeing on the Widget in use. In the Weather Widget after getting the 7 day forcats, the "C" button will get you an hour-by-hour forcast and another press of "C" will bring up the "local" (and I use the term loosely as it is more regional) radar.
Don't know what other Widgets may use as I don't use any other than the weather.
