Volunteers by Opportunity will display a list of registered volunteers for any of your opportunities in the present or past. In this view you can open the volunteer's profiles, add new volunteers manually and cancel registrations.
You can select your opportunity in the Opportunity field and a list of registered volunteers will be displayed. You can open the records by selecting the name and pressing Edit Volunteer or by double clicking it.
You can enter a new volunteer manually to this opportunity by pressing Add Volunteer and entering all the required information for the volunteer.
Finally, you can cancel a registration by selecting the name of the registered volunteer and pressing Cancel Registration.