MIDI : MIDI Editing : MIDI Real-Time Properties

MIDI Real-Time Properties
For more information, see the following topics:
MIDI Real-Time Properties let you change some MIDI properties of MIDI and Instrument tracks (or MIDI clips) during playback. There are five types of MIDI Real-Time Properties: Quantize, Duration, Delay, Velocity, and Transpose.
MIDI Real-Time Properties can be adjusted during playback, so you can listen to the results. Once you have found the settings you want, you can write the settings to the selected tracks or clips. This overwrites the corresponding MIDI properties on selected tracks or clips and resets the Real-Time Properties display to its default settings.
Real-Time Properties can be adjusted in the Real-Time Properties view in the Edit window, or in the Real-Time Properties window.
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For MIDI Real-Time Properties to apply to incoming MIDI data with MIDI Thru enabled, the corresponding MIDI and Instrument tracks must be record-enabled.