Connecting 2010 iMac to 46" HDTV Overscan Issues

I have an 2010 iMac and I have purchased a Display Port to HDMI adapter and a HDMI cable connecting to my Sony Bravia 46" HDTV. My question has to deal with overscan issues when it is displaying on the TV, How exactly can I resolve this problem.
Thank You

It sounds like your Mac is using your TV as a second monitor and has expanded your desktop to encompass both monitors. If you move your mouse to the edge of your Macs screen, and keep going a little bit, the mouse cursor will appear on your TV. Am not sure which edge this will work on, right or left, but give it a try.
You can also open the Display preference pane andset where the two monitors share an edge, or change the configuration to have the second monitor (your TV) mirror your main desktop.
Mirroring is what many people use with TVs so they can easily view movies, photos from ther Mac on the TV with ease.

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