With Crystal mode, Parallels Desktop is able to provide better integration between your Mac and virtual machine. The Crystal mode can hide in your tool bar and Dock and facade itself as a possible Mac application or tool. With hidden menus, icons and controls, Parallels Desktop 5 has become more seamless by lessening the visual clutter on your desktop and speeding up the accessibility of Windows applications. Look at this active crystal mode feature:
Read what people are saying about Crystal mode in Parallels Desktop 5:
@bldngnerd: loving the new Crystal mode in parallels along with their Mac theme for windows, everything looks the same
@paynetc: I'm really loving the Crystal view mode in the new #Parallels 5. The less I have to see #Windows to use it on my #Mac, the better.
If you have any other question regarding using this feature, check out this knowledge base article: http://kb.parallels.com/en/6857