
Overview of the Environment in Logic Pro for Mac
The Environment refers to the virtual environment of Logic Pro for Mac inside your computer. It provides a virtual view of your MIDI studio, giving you complete control over your MIDI setup. You can use the Environment to create virtual connections between MIDI devices, as well as process and filter MIDI data. The Environment includes the following objects.
Note: The Environment is a legacy feature and included for compatibility with projects from older versions of Logic Pro.

Physical Input and Sequencer Input objects: Represent the physical MIDI inputs of your MIDI interface and the Logic Pro input.
Instrument objects: Virtual representations of each MIDI device (synthesizers and samplers, for example) in your MIDI rig.
Faders, knobs, switches, and other objects: Used to create new data, or to control and modify the MIDI signal flow in real time.
It’s not essential to know about—or even open—the Environment in order to make music with the Logic Pro instruments or your external MIDI sound generators and keyboards. When you create new instrument or external MIDI tracks, Logic Pro automatically generates Mixer channel strips, and also creates and configures any Environment objects that are needed for basic input and output.
Note: This is also true of audio channel strips (and other channel strip types, such as aux and output channel strips), but you rarely need to access these objects in the Environment, as you have full control over these channel strips in the Mixer.
The Environment is available only when Logic Pro > Settings > Advanced > Additional MIDI Options is selected.
Open the Environment window
In Logic Pro, do one of the following:
While pressing and holding the Option key, choose Window > Open MIDI Environment (or press Command-0).
Note: If you already have an Environment window open, this command opens another Environment window.
Use the Show/Hide Environment key command to do one of the following:
Open an Environment window.
Bring an open Environment window to the front.
Close an open Environment window.