Apple Final Cut Pro 5 - Manual (Page 976)

Chapter 11 Video Filters 189
II
To apply a filter to part of a clip in a sequence:
1 Select the Range Selection tool in the Tool palette (or press the G key three times).
2 In the Timeline, drag across the part of the clip to which you want to apply the filter.
3 Do one of the following:
 Drag a filter from the Effects tab of the Browser to the selected portion of the clip.
 Choose Effects > Video Filters, then choose a filter from the submenus.
The filter is applied to the selected part of the clip only. When you open this clip into
the Viewer, filter Start and End points appear in the keyframe graph area.
Range
Selection tool
Drag to select the section
of the clip to which you
want to apply the filter.
Start and End points
for the filter