For your reference, here are some details about the functions of the buttons on the real-time footage of the Xiaomi Smart Doorbell 3S:
1. Mute button: Each time you enter the real-time screen, the default monitoring screen is mute. If you want to have a sound when viewing the monitoring screen, tap the mute button to turn on the sound;
2. Definition: The definition of the monitoring screen can be adjusted here, with options of 360p, 2K and automatic;
3. Full screen: Tap this button, and the real-time screen of the doorbell will enter the horizontal screen;
4. Screenshot: The screenshots can be taken off the current monitoring screen, and a picture will be generated and saved to the local photo album and the Mi Home/Xiaomi Home APP;
5. Screen recording: Tap the screen recording button to record the current monitoring screen and save the video to the local photo album and the Mi Home/Xiaomi Home APP;
6. Voice call: Tap the microphone button to make a remote call with the doorbell through the mobile phone Mi Home/Xiaomi Home APP;
7. Voice reply: You can select the edited copy for quick reply, or customize the quick reply.