As a server administrator, you can create new, custom merge types for View Compare/Merge based on the standard merge types of Promote, Rebase, Replicate, or Compare.
The default merge actions are used in the compare phase, are not visible to the user in the View Compare/Merge Wizard, and the user cannot change them.
The options selected are performed by default when the View Compare/Merge session begins the compare phase. The user can view and change these options on the Set Options page of the View Compare/Merge wizard.