By default, the Event List shows all events in the selected MIDI region.
The Event List can also display a list of all regions (and folders) in the Logic Pro main window.
In Logic Pro, click the name of the region with the Pointer tool.
The Event List can’t show the events of a multiple region selection. The Event List behaves as follows:
The events of the last selected region are displayed (this also applies when selecting multiple regions with Shift-click).
The events of the first selected region are displayed when a marquee selection is made.
In Logic Pro, click the Display Level button 
at the top-left corner of the Event List window.
This button is only accessible when the Event List is showing the contents of a region (it’s showing events, in other words).