The Graphic settings section allows you to set some default graphic options for all plans.
Show CAD Drawings... - When checked, shows CAD drawing with a black background.
Automatically Optimize... when checked, optimizes large black and white images allowing for faster navigation.
Convert Colored CAD...when checked automatically converts colored CAD drawings into black and white plans (makes them load faster).
Image Optimizations
Various settings that adjust or enhance how your plans are displayed.