Patent ID: 8167295

Claim:
A printer comprising: a printing unit configured to print an image on a sheet; a cassette configured to accommodate a sheet; a first feeder configured to feed a sheet from the cassette to the printing unit; a first sheet sensor configured to detect a sheet in the cassette; a tray configured to accommodate a sheet; a second feeder configured to feed a sheet from the tray to the printing unit; a second sheet sensor configured to detect a sheet on the tray; an input unit for receiving an instruction; and a controller configured to: when determining with the first sheet sensor that there is a sheet in the cassette, control the first feeder to feed the sheet from the cassette to the printing unit and to control the printing unit to print an image on the sheet fed from the cassette; when determining with the first sheet sensor that there is not a sheet in the cassette, in response to receipt of a predetermined instruction via the input unit, determine with the second sheet sensor whether there is a sheet on the tray; and in response to determining that there is a sheet in the tray, control the second feeder to feed the sheet from the tray to the printing unit and control the printing unit to print an image on the sheet fed from the tray.