Unlinking from a master document can be useful if the project copy was originally made from a master document but the project copy should no longer be released as a revision of the master document but instead released as a new master document. Unlinking the project copy will remove from the master document the reference that was created when the project copy was made from the master document. Unlinking will also unlock the master document if it was locked when the project copy was made.
To unlink a project copy from a master document:
Related tasks
Copying a project copy to another project folder
Discarding a document from a project