Apple Final Cut Express 4 - Manual (Page 369)

Chapter 26 Three-Point Editing 369
VI
To perform an overwrite edit:
m Specify the necessary edit points and destination tracks, then do one of the following:
 Drag the clip from the Viewer or Browser to the Overwrite section of the Edit Overlay
in the Canvas.
 Press F10.
The clip overwrites all items on the destination tracks from the playhead position
through the duration of your edit. No items are moved.
Overwrite section of
the Edit Overlay
in the Canvas
Before an
overwrite edit
After an
overwrite edit
New clip overwrites
existing clips.