If you want to view the active events (alarms) of all your portfolio sites Select Menu-Event Viewer.
In the below picture you see how to change the number of events depicted to each page. Some times it is more convinient to select "All" and have all events in one page.
You can also filter and sort the events by the fileds Site,Severity,Description, State, Date, Source
At last if you want to export the events that you view you can select the "Export icon"