Apple Final Cut Pro 6 - Manual (Page 1794)

Chapter 23 Choosing Settings and Preferences 311
IV
In the following example, the sequence contains ten duplicate frames. Below, the
handle size setting is set to zero frames, so no additional frames are shown.
When the handle size setting is set to ten frames, five additional frames on either
side of the duplicate frames are displayed.
These ten frames are used
twice, so they are shown as
duplicate frames.
Five additional frames
beyond the duplicate
frames are shown here...
...and here.
Ten duplicate frames.