Description of changes between Fiery ImageViewer 3.0 and Fiery ImageViewer 4.0.

1. Fiery ImageViewer 4.0 is based on OpenGL rendering architecture. For this reason, Fiery ImageViewer 4.0 requires a video card/GPU that supports OpenGL version 3.2 and above. If this requirement is not met on macOS, then Fiery ImageViewer 3.0 is started. The OpenGL version can be checked using third party software, such as OpenGL extension viewer.
   • For Windows - http://download.cnet.com/OpenGL-Extensions-Viewer/3001-18487_4-34442.html
   • For macOS - https://itunes.apple.com/in/app/opengl-extensions-viewer/id444052073?mt=
2. On a Windows computer that does not have a video card, or has a video card or GPU that does not support OpenGL version 3.2 and above, Fiery ImageViewer 4.0 will start in software rendering mode.
   Note: You may experience slow performance when you use Fiery ImageViewer in software rendering mode. However, you can use all the features of Fiery ImageViewer 4.0.
3. When you log on to a Windows client computer using Remote Desktop Connection, Fiery ImageViewer 4.0 starts in software rendering mode.
4. Fiery ImageViewer 4.0 can have only five sessions open at a time.
5. Fiery ImageViewer 4.0 shows the raster at the center of the canvas; Fiery ImageViewer 4.0 has the capability of centered image panning.
6. The Monitor Profile option and information to download Fiery Color Profiler Suite has been removed from the Preferences window. Fiery ImageViewer 4.0 uses the operating system default profile for the monitor, including for multiple monitors.
7. Unfocused area in the Navigator pane is grayed out.
8. The Halftone simulation option is not supported.
9. The Magnifier tool is not supported.
10. Fiery ImageViewer 4.0 is not supported on black-and-white products. Fiery ImageViewer 3.0 is started instead.