You would like to manage multiple events from one administration area.
When you have two or more subscriptions in the same administration area, there will always be only one active event in which you are working. This event will be displayed in the page header on each page of your administration area (next to the Search function). All data will relate to this active event.
You can manage multiple subscriptions by changing the active event to another event. To change the active event, go to Events -> Overview. There you will see the list of all of your subscriptions. Simply click on the subscription to select it. Now you will see this event name displayed in the page header on each page of your administration area (next to the Search function).
The default event, displayed by a check mark at Events -> Overview will open each time that the administration area is opened. If you wish to change the default event, you may do so at Events -> Settings -> Advanced Settings -> Default Event.