Holograms. Place holograms in your world, walk around them, then see and hear them from any angle.
Calibration. Repeat the calibration done during the out-of-box-experience. Do this whenever switching users.
Learn Gestures. Repeat the gesture tutorial done during the out-of-box experience.
Photos. See the mixed reality capture photos and videos you take with the device, then place them in world along with holograms.
To unlock the device for development, open the Settings app, go to Update & Security, switch to the For developers page, and set the developer mode toggle to on. This is the same place where you can enable the Device Portal.