Portal 2.0 - Opting into Beta Firmware

 The Opt into Beta Firmware toggle can be found at the bottom of the Controller Profile page for an environment controller within Portal 2.0.

The Controller Profile can be accessed in Portal 2.0 by clicking the Settings tab, Clicking the desired controller within the list of controllers, clicking the ‘Profile’ button that appears at the top of the selected controller, and scrolling to the bottom of that profile page: 

This toggle flags the controller to receive the latest updates that are still currently in Beta testing.

Keep in mind that the features included in Beta Firmware are still being validated and can still be subject to bugs in their logic. Additionally, if one has is using a feature that requires being on the latest available firmware version and one opts out of using Beta Firmware, the functionality of that feature will break.