Prior the official release of iOS 10.1, Apple is rolling out another beta version to show developers what the update has to offer. The Cupertino giant reportedly started rolling out the new beta early Tuesday.

Apple fans especially owners of the new iPhone 7 Plus handset are anticipating the release of iOS 10.1 because it comes with the new Portrait mode that maximizes the functionality of the larger iPhone’s dual-lens camera system. For now, however, this functionality is available to registered developers only via the new iOS 10.1 beta.

According to MacRumors, only registered developers can download the new beta with build code 14B67 either over-the-air or directly from the Apple Developer Center. For developers who are downloading the beta over-the-air, installation of proper configuration profile is required. Apple also warned that the beta version should only be deployed on devices that are dedicated solely for beta software development to avoid issues and problems in case it is installed in a device that is for personal use.

The main focus of the upcoming update is the Portrait mode, for Apple promised during its Sept. 7 launch event that the mobile update would be the one to bring the new mode to the iPhone 7 Plus. The Portrait mode can simulate the desirable bokeh effect that artistically blurs the background and puts the emphasis on the subject of the photo, as per AppleInsider.

Aside from the Portrait mode, the second iOS 10.1 beta version is also expected to come with bug fixes and under-the-hood improvements to enhance the overall user experience of the new mobile operating system. It can be noted that Apple described iOS 10 as its “biggest release ever” because it comes with new features and implementations that enhance the functionality of certain apps.

Apple also released the third macOS Sierra 10.12.1 beta, along with the watchOS 3.1 and tvOS 10.0.1 this Tuesday.