Printing devices include (and printing methods use) among other components, a processor, a printing engine operatively connected to the processor, a media supply tray operatively connected to the processor, etc. The media supply tray supplies sheets of media to the printing engine. The media supply tray has a light visible from the exterior of the printer. The processor controls the light to display different colors indicating different media loading conditions of the media supply tray. The different loading conditions can include a tray in use condition (indicated by the light displaying a first color); tray scheduled for use condition (indicated by the light displaying a second color); tray not in use condition (indicated by the light displaying a third color); tray empty condition, indicated by the light displaying a fourth color; etc.

An image forming apparatus includes an image bearing member, a developing device, a cleaning member, a collecting container having a discharge port for collecting a developer, and a control portion that can execute a supply mode in which a region of the image bearing member that is supplied with the developer from the developing device passes through the contact region with rotation of the image bearing member to allow the cleaning member to supply the developer into the collecting container. The discharge port is provided between a first end portion and a second end portion of the image bearing member in a direction of a rotation axis line of the image bearing member. The control portion performs control such that a portion of the region supplied with the developer in the supply mode overlaps, in the direction of the rotation axis line, a position where the discharge port is provided.

An image forming apparatus includes a plurality of feeding decks each containing a recording sheet, a display unit, an image forming unit that forms an image on the recording sheet conveyed from one of the plurality of feeding decks, a scanning unit that scans the image formed by the image forming unit, one or more processors and one or more memories cooperating to perform control to display information about the plurality of feeding decks on the display unit and select a feeding deck from among the plurality of feeding decks based on a user instruction, and a diagnosis unit that diagnoses a defective part in the image forming unit based on the image formed on the recording sheet by the image forming unit, the recording sheet being conveyed from the selected feeding deck, the image being obtained by scanning by the scanning unit.