Image forming apparatus that performs display for replacement of developer container, and method of controlling same

A method of controlling an image forming apparatus including an image forming unit configured to form an image on a sheet using developer in a developing device, a sensor provided for the developing device, for detecting the developer in the developing device, a mount section on which a container containing developer to be replenished to the developing device is mounted, a replenishment unit configured to replenish the developer in the container mounted on the mount section to the developing device, and a display, the method comprising:

• determining whether or not an amount of remaining developer in the container mounted on the mount section is larger than a predetermined amount;
• controlling the display, in a case where a predetermined condition related to an amount of remaining developer in the developing device is satisfied based on a result of detection by the sensor in a state in which the container is mounted on the mount section, to display a first screen for prompting a user to replace the mounted container;
• and
• controlling the display, in a case where the predetermined condition is satisfied based on the result of detection by the sensor in a state in which the container containing remaining developer in an amount larger than the predetermined amount has been removed from the mount section, to display a second screen for prompting the user to remount the removed container.