The Event Creator can view and edit some aspects of a CLOSED event, which includes reassigning (if needed) the evaluation owner or envelope opener as well as adding team member to the event.
i. Event creator can reassign the evaluation owner and envelope opener if a need arises, mainly due to the inability of the initially assigned evaluators to fulfill their duties. See article on Editing Evaluators in an Ongoing RFx
Note that all changes that are made are recorded in the event audit trail.
ii. Event creator can also assign more team members to the event as viewers. (See article on: Adding Team Members to an Ongoing RFx)