A maximum of 500 sheets of paper from size 5-1/2" x 8-1/2"R to 11" x 17" (A5R to A3) can be loaded into trays 1 and 4.
If you loaded paper of a different type or size from the paper previously loaded, be sure to check the settings in "Setting mode". Incorrect setting affects automatic paper selection action. It may cause print failure, printing on paper of a wrong size or type or paper misfeeds.
Do not place heavy objects on the tray or press down on the tray.
To check the type and size of paper:
In "Setting mode", select [System Settings] → [Paper Tray Settings].