
Clip Length project settings in Logic Pro for Mac
When Enable Complete Features is selected in Advanced settings, Clip Length project settings are available.
With the checkboxes in the Clip Length settings, you can select for which type of MIDI events Logic Pro for Mac sends a default value when the playback reaches the end of a region. A reset message is only sent if the corresponding event type is present in the region and was sent during playback.
Note: You can turn off this function for each region individually by deselecting the Clip Length checkbox in the Region inspector.

Aftertouch to zero checkbox: Sets the Aftertouch (channel pressure) MIDI message to zero at the end of the MIDI region.
Pitch Bend to center position checkbox: Sets the Pitch Bend MIDI message to the center position at the end of the MIDI region.
Control 1 (Modulation) to zero checkbox: Sets the Control 1 (Modulation) MIDI message to zero at the end of the MIDI region.
Control 2 (Breath Control) to zero checkbox: Sets the Control 2 (Breath Control) MIDI message to zero at the end of the MIDI region.
Control 4 (Foot Control) to zero checkbox: Sets the Control 4 (Foot Control) MIDI message to zero at the end of the MIDI region.
Control 11 (Expression) to max checkbox: Sets the Control 11 (Expression) MIDI message to its maximum value at the end of the MIDI region.