| CPC B41J 2/17566 (2013.01) [B41J 2002/17573 (2013.01)] | 16 Claims |

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1. A printer apparatus comprising:
a light emission unit;
a display unit for displaying a screen; and
a control unit,
wherein the control unit is configured to control the display unit and the light emission unit, based on a state of a storage provided in the printer apparatus and storing recording materials used for printing is in a predetermined state, so that a first screen is displayed and so that the light emission unit emits light in a predetermined light emission method,
wherein the control unit is configured to control the display unit and the light emission unit, in a state in which the first screen is displayed on the display unit and the light emission unit is controlled to emit light in a predetermined method, when a predetermined operation is performed on the printer apparatus based on the predetermined operation, so that a second screen different from the first screen is displayed and so that a state of the light emission unit is changed,
wherein the control unit is configured to control the light emission unit, so that the light emission unit returns to a state in which the light emission unit emits a first light emission pattern, based on a fact that a carriage provided on the storage moves to a predetermined position in a state in which the light emission unit emits a second light emission pattern.
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