is a source 720p or 1080i?

With a Kuro 9G how can you tell if a source is broadcasting at 720p or 1080i?

Unlike most other HDTV's the Kuro's "display" button doesn't reveal this resolution information. The display button only shows an HD tag if the source is high definition (720 or 1080). The lack of an HD tag means the resolution is 480.

Fortunately there is a way to determine if the HD resolution is 720 or 1080. Pop-up the Tools menu and look at the available screen size modes. If the "Dot by Dot" option is visible then the source is 1080, if it isn't then the source is 720. Since the the Kuro 9G is a 1920x1080 panel the non-native 480 and 720 resolutions need to be scaled and cannot be displayed "Dot by Dot."

Update Feb 5 2009
The Kuro 0904-0401 firmware update added the display of resolution information for the different video inputs. This resolution information is not displayed for the ATSC/QAM tuned channels so the "Full" and "Dot by Dot" trick is still useful.