You can also use the front-facing camera to take panorama photos by
panning the phone either to right or left.
Tips for panorama photos
You can take panorama photos from the furthest locations as long
as the panorama allows. You may also stop the shooting by tapping
the Shutter button.
Remember to pan the phone slowly to make sure that the camera
captures as many details as it can and focuses better. This could
also make the photos less blurring.
Avoid moving the camera up and down during shooting, otherwise,
the photos may be formed unevenly.
HDR
HDR is referred to as High Dynamic Range Imaging. When HDR is on,
your photos will be reproducing a greater dynamic range of luminosity,
making the photos acquire more display contrast and be closer to what
the human eyes see. Tap HDR, you can set it as "On", "Off", or "Auto".