Apple Final Cut Express HD - Manual (Page 754)

754 Part IX Effects
5 Do one of the following:
 Drag the clip from the Viewer to the Fit to Fill section of the Edit Overlay in the Canvas.
 Press Shift-F11.
The material in the Viewer overwrites any material already between the sequence In
and Out points you specified. The speed of the source clip is changed to compensate
for the difference in duration.
Fit to Fill section of
the Edit Overlay
in the Canvas
Before a fit to fill edit
After a fit to fill edit
The speed of the clip changes to
fit the specified area of the
sequence.