1. You can go to the settings by clicking your profile or the button below your profile.
2. Click settings and then go to Audio settings.
3. In the audio settings, you can test your speaker by clicking on the test speaker button. You can also test your microphone by clicking on the test microphone button. You can do this before joining any calls or meeting to make sure that everything is working. You may also adjust other settings according to your needs and preferences.
4. For the video settings, just click on Video. Adjust the settings according to your needs and preferences.