Apple TV/FM Radio System - Manual (Page 87)

Adjusting the picture
To adjust the brightness, sharpness, contrast, and color of
the picture:
1 Choose Show Controls Window from the Windows menu.
The Controls window appears.
2 Click the video screen icon.
The screen controls appear.
3 Drag the appropriate slider to adjust the picture to your
liking.
You can also click anywhere in a slider’s track to move the
slider to that position. The picture adjustments take effect as
you make them, so you can monitor your changes.
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