A. 1. Explore the app: Take some time to navigate through the app and familiarize yourself with the interface. Look for help or tutorial sections that may guide you on how to change viewers. 2. Check for updates: Ensure you are using the latest version of the app, as updates may improve the interface and usability.

B. 3. Use online resources: Search for user guides or video tutorials online that explain how to navigate the interface and change viewers.