Create control surface groups in Logic Pro
If you have multiple control surface units, you can define how they relate to each other by creating control surface groups. A control surface group consists of multiple devices that you combine to create a single, unified virtual control surface.
You can create up to 20 control surface groups. Each group can consist of any number of physical devices. The only limiting factor is the number of available ports.
You can independently determine the default behavior of each device in a group. For more information, see Control surface Device parameters in Logic Pro.
Note: Assignments created by Lua scripts are created within a separate top level, modeless, zone that is named after the device. These assignments are always active and interact with Control Surface Group 1.