To edit a Scheduling item, there must be a valid user connected to the application. On the List Interface, click Edit Schedule on a Scheduling item. On the Calendar Interface, select a Scheduling item on the tree view to view on the calendar all Scheduling items referring to the selected item and click a Scheduling item to open the edition window displayed on the next figure.

Window to edit a Scheduling item

Please check topic Configuring a Scheduling for more information about the available options on this window.