Apple iMac (Mid 2006) - Manual (Page 41)

Chapter 3 Using Your iMac 41
 Someone to videoconference with (for example, you can videoconference with other
iChat AV, AOL, or AIM users)
To start a videoconference:
1 Open iChat AV.
2 Click the Camera button next to a buddy in your buddy list.
The green indicator light lets you know you are displaying video. Clicking the camera
button sends an invitation to your buddy to accept your video request and lets you
preview how you look on camera. When a buddy accepts your invitation, you can see
the buddy on your screen and you appear on your buddy’s screen.
Turning Off the iSight Camera
To turn off iSight, close the active iChat window. The green indicator light turns off
showing that the camera is off and video has stopped.
More information about iChat AV is available in Mac Help. Choose Help > Mac Help,
then choose Library > iChat AV Help.