How do I load paper into Tray 1 (the multipurpose tray)?

Open Tray 1, pull out the tray extension to support the paper, then use the blue adjustment latch to widen the paper guides before loading paper. Make sure the paper stack does not exceed the maximum fill line — the maximum stack height is 10mm or approximately 100 sheets of 75 g/m² paper. Do not add or remove paper from Tray 1 while printing to avoid jams. (Page 21)