Length as Absolute Position ⌃⇧A

Works in the Event List windows. Toggles the display of Length/Info (note start) to Off Position/Info.

Change event position and length in Logic Pro — Apple Support

View > Length as Absolute Position: Makes the length display show the absolute position of the note off event, rather than its length from the note on position.

  Select Next Event    ↓

Selects the next event.

Logic Pro Event List editor overview — Apple Support

The Event List is the most powerful, flexible, and complete MIDI editor in Logic Pro. All MIDI event types are listed alphanumerically in the Event List.

  Create Event

Creates a new event of the type indicated at the top of the Event List.

Create events in the Logic Pro Event List — Apple Support

The Event List accepts real-time and step recording of MIDI events, as described in Overview of recording in Logic Pro. Similar to the other MIDI editors, you can also create events directly in the Event List.