If you have appropriate permissions, you can edit events through the Event Management page, where existing events are listed, along with the event icon and other details.
The options you see in the Action column depend on your rights in relation to this event and the current status of the event, such as ongoing or ended.
Note the following about events:
Editing an active event generally includes updating the event details. For multi-region events, this can include adding and removing regions.
Some events end automatically after a period of time. An authorized user can manually end an event prior to the indicated end time.
You can also schedule events to begin at a future date. This is useful for sporting events, training sessions, drills, and exercises.
Users who are authorized to work with ad hoc events can create, edit, and end them.
EMResource automatically sends notifications to appropriate users when events are created and, for some, when they are ended. In addition, adding a resource to an active event and changing the regions associated with an active multi-region event also generate automated notifications.