If you are using a microphone, or gaming headset with Steam, the default setting for chatting with your friends is Open Microphone , meaning that your microphone is on all the time whilst you are playing. If you want to change these settings and enable the Push-to-talk mode follow the steps outlined in this short article.
Enable Push-to-Talk Mode
If at a later stage your want to disable the push-to-talk mode or use the push to mute mode you can follow these same steps, and simply select the other options. Photo by Fredrick Tendong on Unsplash