HP 3500 - Manual (Page 85)

3. Move the side width guides until the blue arrows on the width guides point to the size of
paper you are loading.
4. On the back of the tray, press the blue ridges and slide the length guides until the arrow
symbol points to the size you are loading.
5. Load the paper into the tray. If this is special paper such as letterhead, load it with the
side to be printed down and the top edge toward the front of the tray.
Note If you are duplex printing, see 2-sided (duplex) printing for loading instructions.
ENWW Configuring trays 73