You can set a paper size, paper tray, and paper weight, and paper type with the printer driver.
If setting details are not displayed in the print dialog box for Mac OS X 10.7 to 10.10, click [Show Details] at the bottom of the dialog box.
If the print option is not displayed in the print dialog box for Mac OS X 10.6.8, click the disclosure triangle next to the [Printer] drop-down list.