Logic Pro X keyboard command of the day. #LogicProX @StudioIntern1

  Toggle Channel Display Default of Multi-Instrument

This command (apparently) affects the Environment display of Multi-Instruments. The only (semi) useful documentation about the MIDI Environment is in the user guide for earlier version of Logic Pro. The best descriptions I can find are in the Logic Pro 9 manuals.

Logic Pro 9 User Manual: Getting to Know the Environment

The Environment refers to the virtual environment of Logic Pro inside your computer. It was developed to allow complete control over your MIDI setup.

⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND