EventType.ExecuteCommand

Description

Execute a special command (eg. copy & paste).

"Copy", "Cut", "Paste", "Delete", "FrameSelected", "Duplicate", "SelectAll" and so on. Sent only in the editor. Example. Checking that that a frame has the focus:

using UnityEngine;

public class Example : MonoBehaviour
{
    void OnGUI()
    {
        //implement frame selection
        Event e = Event.current;
        if (e.type == EventType.ExecuteCommand ||
            e.type == EventType.ValidateCommand)
        {
            if (Event.current.commandName == "FrameSelected")
                Debug.Log("frame selected");
        }
    }
}

Additional resources: Event.commandName, EventType.ValidateCommand.