Select the original you want to print.
Select [Print...] on the [File] menu.
Select [Printer Features] in the pop-up menu.
Select [Print Quality] in [Feature Sets:].
The item names in [Feature Sets:] differ depending on the version of Mac OS X you are using.
Click the pop-up menu for the item you want to modify, and then select the value you want to use.
Print the original using the print function in the default application of the original.
For details about the each setting, see Printer Features.