Learn new Controller Assignment ⌘L

Assign a command to a controller. Perfect for using MIDI controllers with pads, knobs, and faders. Control Logic from your playing surface.

Overview of controller assignments in Logic Pro — Apple Support

You assign controllers to parameters in the Controller Assignments window using the Learn process. The Controller Assignments window has two views: a compact Easy view, where you can assign channel strip and plug-in parameters, and the more extensive Expert view, where you can create and edit any type of controller assignment, including global, automation, and control surface group assignments.