Night Mode is supposed to offer smartphone owners a way to use them more easily in the dark by applying a blue-light filter toggle. Google decided to remove Night Mode from the first Android 7.0 release, due to what the company said were performance issues with the feature. However, some enterprising developers released an app called Night Mode Enabler that allowed some, but not all, phones with the OS to use the feature.
Unfortunately, when Google released the Android 7.1.1 Developers Preview, it also disabled the Night Mode Enabler app and similar third-party apps. Now, another developer says he has managed to release a mod that will enable Night Mode again on the Nexus 6P with the Android 7.1.1 Developers Preview. His files can be found on the XNA Developers forum.
Keep in mind that this is a third-party mod and that it has not been widely tested, so there are sure to be some bugs in this release. Also, you should always download and install files like these at your own risk. However, if you really, really want Night Mode on your Nexus 6P with the latest Android 7.1.1 Developer Preview, this might be worth checking out. Are you disappointed that Google has removed Night Mode from Android 7.0?