Pivoting sheet discharging tray and image forming apparatus including the tray

An image forming apparatus including a sheet discharging tray, the sheet discharging tray comprising:

• a discharger configured to discharge a first sheet and a second sheet after the first sheet;
• a standby tray configured to temporarily support the second sheet on the first sheet;
• a process tray configured to support the first sheet and the second sheet, which are supplied from the standby tray, to be aligned and stapled;
• a support configured to support the first sheet on the standby tray;
• and
• a controller configured to control the support so that a first angle is smaller than a second angle, the first angle being an angle between the first sheet supported by the support and the second sheet discharged to the standby tray, the second angle being an angle between the second sheet and the standby tray, wherein the controller is configured to change the first angle according to a size of the second sheet supported by the standby tray and make the first angle smaller stepwise, according to an increase in a sheet conveyance distance based on the size of the second sheet supported by the standby tray.