How to change image pixel size and colour display settings after scanning.

Adobe Photoshop

In Adobe Photoshop, open Image and select Image Size. A window opens up which displays the Pixel Dimensions (the size of your image in relation to your screen size) and Print Size of your image. If you want to resize your image, you have to keep Resample Image on and if you want to keep the same proportions of width and height, keep Constrain Proportions on. In the Pixels Dimensions frame, change the width and/or height of the image to the size that you want in proportion to your screen size. Image pixels will be resampled to fit in with the new proportions. A word of warning: resampling leads to a loss of image quality as new pixels are being "deviced" for the new image size, based upon the old pixels values of the original image. This means that during resampling, some pixels values may be averaged or incorrectly represented, resulting in an image of lower quality.

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