Apple Final Cut Express 4 - Manual (Page 710)

710 Part IX Effects and Color Correction
“Copy To” Rule
If the current clip has multiple filters and you’re copying to a clip with multiple filters,
Final Cut Express copies the current filter’s settings to a filter with the same index
number in the next clip as that of the current filter. For example, if the current clip has
three filters, and the next clip has three filters, using the Copy To 1st Clip Forward
button in the Color Corrector-2 tab copies that filter’s settings into the second Color
Corrector filter in the next clip.
If the clip you’re copying to doesn’t have any Color Corrector filters, the Copy To
buttons create a new filter with these settings. If there are no clips following the
current one, these buttons are dimmed.
Menu Commands for the Copy Filter Controls
Some Copy Filter controls have equivalents in the Copy Filters submenu of the
Modify menu:
 From 2nd Clip Back
 From 1st Clip Back
 To 1st Clip Forward
 To 2nd Clip Forward
Copy To 1st Clip Forward button
Current clip
Next clip