Start With
Take full advantage of the powerful front facing camera of the Mate 20 series.
Never lose an important landmark even when taking a selfie. Use the Panorama mode to capture wide-angle amazing photos.
Follow these steps
On Screen Instructions
Open the Camera 
and press 
to switch to the front camera. Then go to More and select Panorama. Panoramic selfies can be taken only in portrait mode;
this feature does not work in landscape mode.
Hold your phone steady and tap
to take the first picture.
Follow the on-screen instruction and move your phone to the left and then to the right until the blue frame overlaps the square screen frame. The camera will automatically take another two pictures.
and press
to switch to the front camera. Then go to More and select Panorama. Panoramic selfies can be taken only in portrait mode;
this feature does not work in landscape mode.Hold your phone steady and tap
to take the first picture.Follow the on-screen instruction and move your phone to the left and then to the right until the blue frame overlaps the square screen frame. The camera will automatically take another two pictures.
Final Result
Once complete, the camera will combine the three pictures into a stunning wide-angle selfie,
capturing all your special moments.
Done