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Preview 5.x: Resize an image

Resize an image with Preview

You can resize an image to fit into a particular spot. Or, if you need to save disk space or download an image more quickly, you can reduce the file size of the original.

Change an image’s dimensions

  1. Choose Tools > Adjust Size.
  2. Enter new values for width and height, or choose a common size from the “Fit into” pop-up menu.
    • To resize the image by a percentage, choose “percent” from the pop-up menu next to the Width and Height fields, and enter the percentage in those fields.

    • To ensure that the image keeps its original proportions, select “Scale proportionally.” If you change either the width or height, the other value changes to maintain the proportions. If you choose a size from the “Fit into” pop-up menu, the image’s width or height may be smaller than the chosen size to maintain the proportions.

    • To make the image’s dimensions smaller without losing any detail, deselect “Resample image” before changing the width or height.

To resize multiple images at the same time, display the images in the same window, select them in that window’s sidebar, and then choose Tools > Adjust Size.

Reduce an image’s file size

  1. Choose Tools > Adjust Size.
  2. Select “Resample image.”
  3. Enter a smaller value in the Resolution field.

    The new size is shown at the bottom of the dialog.

To resize multiple images at the same time, display the images in the same window, select them in that window’s sidebar, and then choose Tools > Adjust Size.

Last Modified: May 1, 2013
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