HP Deskjet 6540 Color Inkjet Printer - Manual (Page 162)

Setting the paper size
When changing the paper size in the paper tray, all three paper guides must be set
to the correct setting.
Follow these steps to set the paper size:
1. Remove the lower tray from the base.
2. Slide the paper-width guide until the arrow is even with the correct setting.
1. Align the arrows
Note: To print on legal-sized paper, set the paper-width guide to LTR.
3. Set the paper-width fence by carefully inserting it into the appropriate slots.
HP Deskjet 6500 series printers User's Guide
162