You can modify events from the Manage Events panel in the Schedule module.
To modify events:
Select Navigate, then Schedule, and then Manage Events.
A recurring and externally triggered event list is displayed.
To filter the events list, select Filter from the toolbar area. Complete the Filter dialog and select Apply.
Select an event, right-click and select Modify.
Change properties.
Click OK.
The modified event is displayed in the events list.