Suppose you are editing a project and you send a copy to an assistant editor to work on a particular sequence. While editing, the editor modifies the Master Comment 1 and Label properties of several clips in the sequence. When you get the project back, you drag the newer sequence into your project and Final Cut Pro determines the following:
The clips in the source (newer) sequence match master clips in the destination (original) project.
One or more of the following source and destination clip properties do not match:
Name
Good
Label
Label 2
Log Note
Scene
Take
Master Comments 1–4
Final Cut Pro displays the Copy Master Clip dialog to help you resolve the differences between clip properties.
The Copy Master Clip dialog appears when you move or copy matching clips from one project to another project and some clip properties are not the same. This dialog contains three options for resolving matching clips with different properties:
Use properties from the clip you are adding to the destination project.
Use properties from the existing clip in the destination project.
Create a new master clip (and affiliate clips, if necessary) with the properties from the clip you are adding.
A fourth option, described below, allows you to apply the option you choose to all clips added to your project.

This option replaces a master clip’s properties in the project with the newly added clip’s properties, and the two clips become affiliated.
This option ignores the added clip’s properties and leaves the destination master clip’s properties unchanged. The two clips become affiliated.
This option creates a new clip in the destination project that contains all the properties from the added clip. The original clip in the destination project is unchanged and retains its old clip properties. Both sets of properties from the added clip and the clip in the destination project now exist in the destination project. This is a good choice when you want to retain properties, such as comments, from both clips.
Note: A new master clip is always created with this option, but it may not always appear explicitly in the Browser. For more information, see Implicit and Explicit Master Clips.
If you are moving or copying multiple clips from one project to another, there may be multiple clips with conflicting properties. To avoid checking this dialog for every occurrence of matching clips, you can select “Apply to all added clips with clip property conflicts.” This option handles every master clip conflict automatically using the option you selected in the Copy Master Clip dialog.
The options in the Copy Master Clip dialog determine the relationship between new clips added to a project and existing clips.
Create two Final Cut Pro projects (in this example the projects are called Source and Destination).
In the Source project, import a media file and name the resulting clip Test.
Select the clip and then choose Edit > Copy.
Click the Destination project tab, then choose Edit > Paste.
The Source and Destination projects now both contain identical master clips called Test.
In the Destination project, rename the clip New Name.
While still in the Destination project, choose Edit > Paste again.
Final Cut Pro attempts to paste the original clip, named Test, but finds a similar master clip whose Name property does not match. The Copy Master Dialog appears.
Do one of the following:
If you copied and pasted multiple clips from one project to another, you can also select “Apply to all added clips with clip property conflicts.”
This option automatically handles all master clip conflicts the same way for the duration of the operation.