On my Cinema Display the screen is blurry and shifts with mouse movement.

I have had this screen for a year and a half and only use it once a week in my remote office. This morning I noticed blurring on the screen and the whole screen shifts up/down, left/right with mouse movement. Please help. I am getting a headache.
Thanks In Advance,
Rob

Press Command-Option-8 once or twice.
You have Zoom on. It is controlled in "Seeing" in "Universal Access" system preference, and by Control-Scrollwheel.

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This just started happening. I don't know what's causing it, but my display jitters back and forth with mouse movement. Left and right. As I move the mouse the screen moves two pixels to the right or left when I move the mouse. After 2 pixels it stops.
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Open System Preferences/Universal Access. Turn off "Zoom", and things should be normal again.

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On my Cinema Display the screen is blurry and shifts with mouse movement.

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