You can use the role editor to create custom roles and subroles, change a role’s color, and change the name of a custom role or subrole.
To open the role editor, do one of the following:
Choose Modify > Edit Roles.
In the Roles pane of the timeline index, click Edit Roles.
Control-click a clip and choose either Assign Audio Roles or Assign Video Roles, then choose Edit Roles from the submenu.
With a clip selected in the browser or the timeline, open the Info inspector, then click the Roles pop-up menu and choose Edit Roles.