For the PCL 6 printer driver

Click the menu button of the application you are using, and then click [Print].

Select the printer you want to use.

Click [Preferences].

Click the [Detailed Settings] tab.

In the "Menu:" box, click [Print Quality:Standard].

Select [On] in the "Toner Saving:" list.

Change any other print settings if necessary.

Click [OK].

Start printing from the application's [Print] dialog box.