The window 'Compatibility with Windows 2000...' is intended for adjusting of the mode of compatibility ABView with animation video effects in Windows 2000. They are possible two modes of compatibility: automatic ('Automatic compatibility' flag is set) and manual (the flag is discarded). It is recommended never no discard this flag.

Note: window 'Compatibility with Windows 2000...' is appeared when clicking the 'Windows 2000' button located in the down-left corner of window 'Options', which is only seen on Windows 2000.