Carolyn,

Printing parameters are set by your printer's driver software, not by Photoshop. Without knowing anything about the details of what you set for your particular page setup and print dialogs, it doesn't give us much to go on for walking you through this. And each printer can have its own, unique dialog boxes that address features particular to that printer. Knowing your OS would also be helpful.

More details, including links to screen shots of the dialog boxes would be helpful.

Neil