The Appearance Options dialog sets preferences for the overall appearance of Kaleider.  The default Kaleider Original Interface Style, with colors on a dark background, can be difficult to see on some display monitors, or even hard on the eyes.  In such cases, the Interface Style can be switched to Standard Windows, which provides a lighter, more conventional appearance.  The Raised Buttons option will show buttons as 3D boxes.  The Background Color can be chosen or quickly set to match the current Mandala Color.  This screen also provides options to control the appearance of Mandalas.
Appearance Options - Kaleider Original Interface Style Appearance Options - Standard Windows Interface Style