MIDI : MIDI Editors : Velocity, Controller, and Automation Lanes

Velocity, Controller, and Automation Lanes
MIDI Editor windows let you edit velocities, MIDI controller data, and automation for all shown MIDI, Instrument, and Auxiliary Input tracks in lanes under the Notes pane.
You can move and resize Automation and Controller lanes just like in the Edit window.
When viewing multiple MIDI and Instrument tracks, the velocities for notes on separate tracks are superimposed in a single lane, just like notes in the Notes pane. However, all other Controller lanes are grouped by automation and controller type, and provide individual lanes for each shown track.
To show or hide lanes under the Notes pane:
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To add lanes:
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To remove lanes:
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To change the Automation or Controller type for a lane:
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Click the Automation or Controller Type selector and select the Automation or Controller type you want.