You can use  to alter the view and look of a pre-rendered image or animation sequence. For example, you can adjust luminance, gamma, and
            saturation.  has features that can be accessed through:
         
            - command line options. See FCheck options.
            
- hotkeys. See FCheck hotkeys.
            
- using the mouse. See FCheck Mouse controls. 
            
- toolbar buttons. See FCheck Control Bar.
            
- the menu interface on some platforms.  menus in Windows and Mac OS X versions let you open and save images or sequences.
            
- the info window on Mac OS X. It is used to apply features that are otherwise unavailable on Mac OS X. See Mac OS X.