The configuration dialog box is accessed with the -> option. It has two pages; General settings and Ghostscript configuration
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 separate box on if you want to be informed of any output or error messages generated by the Ghostscript interpreter.
You can choose whether KGhostView uses a Monochrome, Grayscale or Color Palette for the display.