HP Deskjet 6540 Color Inkjet Printer - Manual (Page 161)

4. Gently place the printer on top of the paper tray.
16.2.2 Loading the 250-Sheet Plain Paper Tray Accessory
Two parts
The 250-Sheet Plain Paper Tray Accessory has two parts.
1. Base
2. Lower tray
The lower tray has three size adjusters.
1. Paper-width guide
2. Paper-width fence
3. Paper-length guide
Note: When changing the paper size in the paper tray, you must set all three
paper guides.
HP Deskjet 6500 series printers User's Guide
161