If you are one of those people (like me) who are constantly taking screen shots of your ProE models to paste into PowerPoint, etc, then I have some good news for you
You can dramatically improve the way your models appear directly onscreen by using Photorender: View -> Model Setup -> Render Control. Click "Render Final Image" on the toolbar that pops up and see the difference! If you do a screen capture now it is going to look so much better.
The default background color for rendered images is black. To change the background, click "Modify Render Settings" on the rendering toolbar, and then check the "Render Room" box. Close that dialog and click "Modify Room Settings" on the render toolbar. Click on one of the walls and set the color to white, do the same for the ceiling and floor. Now render the final image and you'll have a white background instead of black.
You can of course do much more detailed renderings and output to a file, but just doing the basic steps above to render the image directly on your screen will make a world of difference in any screenshots you take, and the process takes all of about 15 seconds