To do so, click on "Options"(Gear picture) button located on the right hand upper corner of the screen. In the new windows, click on "Audio Device" settings, which is located on the left side of the scrren. Then under Microphone, select the HD Pro Webcam C920. Now, right below the "Audio Device" settings you will see the "Video Device" settings. Click on that and and select the Logitech HD Webcam C920 as you default camera. Click Ok and exit out of the screen.