Captivate provides you with the option of compressing slide data that is shared between slides. This option reduces overall file size and it is the default setting.
Note: In certain circumstances, compressed movies may not appear correctly when imported into Macromedia Flash. In such a case, do not select the advanced compression option. This will, of course, increase the file size.
Open a Captivate movie.
From the Movie menu, select Preferences.
Click the Preferences tab.
Select Advanced movie compression.
A check mark appears next to the option.