HP color laserjet 4600 dn printer How do I set

From the control panel of the printer, do the following:
1. arrow down once to highlight the 2nd item: "paper handling".
2. press the check button (turquoise color) to select this option.
3. arrow down 2x's until you highlight the "tray 2 size".
4. hit the check button to select this item.
5. You should see a size that is "letter" and there should be a ' * ' asterisk which means that is the default setting. If you see other paper sizes as well, then arrow up or arrow down to highlight the preferred size, and then press the check button to insert the asterisk ' * ' which will set that as the default.
6. you change the paper type as well as paper size for the other trays in the same fashion. Most HP printers will select paper according to the SIZE as well as the TYPE. The printer can "sense" the paper size in the paper cassette tray by the stops that hold the paper. Therefore the printer will choose that paper based upon the SIZE and what you define as its type.