Apple Logic Pro 9 - Manual (Page 674)

2 Click at different points in the gray area to create Hyper Draw nodes.
A connecting line is automatically created between the nodes.
To resize the Hyper Draw area
µ
Grab, and vertically move the dividing line that separates it from the Piano Roll grid area.
For more information, see Using Hyper Draw in the Arrange Area .
674 Chapter 23 Editing MIDI Events in the Piano Roll Editor