Apple Final Cut Express 4 - Manual (Page 709)

Chapter 46 Color Correction 709
IX
“Copy From” Rule
If the current clip has multiple filters and you’re copying from a clip with multiple filters,
Final Cut Express copies from a filter with the same index number as the current one being
adjusted, if possible. For example, if the previous clip has three filters, and the current clip
has three filters, clicking the Copy From 1st Clip Back button in the Color Corrector-3 tab
copies the settings from the third Color Corrector filter in the previous clip.
If the previous clip doesn’t have the same number of filters, the Copy From buttons
copy settings from the first available Color Corrector filter. If there are no Color
Corrector filters in the previous clips, these buttons are dimmed.
Copy From
1st Clip Back
button
Current clip
Previous clip