Samsung SP-LSP9TGA E-Manual page 6

Move the projector back and forth to adjust the screen size.
2.
When the screen looks skewed or distorted, use the, Screen Adjustment ( Settings General Projector Settings
Screen Adjustment) function. Try Now
When the screen looks blurry, use the Focus ( Settings General Projector Settings Focus) function.
Try Now
For more information about screen adjustment, refer to "Setting the Viewing Environment for Projector".
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