Configuration
The configuration dialog box is accessed with the Settings Configure ... option. It has two pages; General settings and Ghostscript configuration

General settings
You can select Enable anti-aliasing of fonts and images to get smoothly rendered text, but note that antialiasing is memory intensive and slower than straightforward rendering of fonts. Early versions of Ghostscript could not perform antialiasing.
Select Use Platform fonts if you wish to use your native system fonts rather than those that come with Ghostscript.
Turn Show Ghostscript Messages in a seperate box on if you want to be informed of any output or error messages generated by the Ghostscript interpreter.
You can choose whether uses a Monochrome, Grayscale or Color Palette for the display.

Ghostscript configuration
In this dialog box page you can set the name of the Ghostscript Interpreter executable and the Non-antialiasing arguments: and the Antialiasing arguments passed to it. The default settings should be suitable for most systems.