The camera activation button is located at the top left of the meeting page.
Once you click on the camera icon, the popup to allow the Adobe Flash Player appears. Once you click on Allow, the diagonal slash from the camera icon disappears and a place to tweak your webcam or audio appears.
From here, you can select different device drivers for webcam or audio. You can adjust your mic volume. You can turn either the webcam or mic off. You can check the Loopback box to check your own audio output, but do not keep the Loopback box checked too long or you may experience feedback. Finally, if you have the right, you can place yourself onto the Stage, so that other participants can see and hear you.
Note: newrow_ automatically recognizes your computer's default devices upon selecting the activation button.