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With Dot for Dot activated, every pixel in the image is displayed as one pixel on the screen. This mode is useful for web images. However, if you are working on images to be printed, disable Dot for Dot. To disable Dot for Dot, go to View Dot for Dot and uncheck Dot for Dot. (Note that this only unchecks Dot for Dot for the current image. To deactivate Dot for Dot permanently, go to Edit
Preferences
Image Window and uncheck “Dot for Dot” by default and click OK.)