A number of the UniTool dialog boxes specify predefined values that correspond to common paper sizes, paper qualities, paper sources, paper destinations, and text qualities. These same dialog boxes also provide a control in which you can type a driver-defined value; you should only specify a private driver-defined value if your printer does not support one of the predefined values. For example, there are five predefined text qualities:
If the printer for which you are developing a minidriver supports a different text quality, you would type a string identifying that quality in the driver-defined control of the Text Qualities dialog box.
The predefined or driver-defined strings and values that you specify typically appear when you choose an application's Printer Setup command and Printer Setup Options dialog box.