To change system options, click 
Options 
 (Standard toolbar) or .
Use Software Open GL selected
- Turn on:
| High quality for normal view mode | (Performance Options) |  
 
- Turn off:
| High quality for dynamic view mode | (Performance Options) |  
| Display shaded planes | (Display and Selection Options) |  
| Top/Bottom Gradient colors | (Color Options) |  
| Display plane when shaded | (Sketch Options) |  
| Shadows | (Click View Settings  (Heads-Up View toolbar) and clear Shadows in shaded mode) |  
 
Use Software OpenGL cleared
- Turn on:
| High quality for normal view mode | (Performance Options) |  
| High quality for dynamic view mode | (Performance Options) |  
| Gradient (Top/Bottom Gradient colors) | (Color Options) |  
| Display shaded planes | (Display and Selection Options) |  
| Shadows | (Click View Settings  (Heads-Up View toolbar) and clear Shadows in shaded mode) |  
 
- Turn off:
| Display plane when shaded | (Sketch Options) |