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# Image size

Use the Image Size ability to change the print dimensions and resolution of an image.

- Image ‣ Image Size...
- Option ⌥ + Command ⌘ + I

Pixel Dimensions

Pixel Dimensions are the horizontal and vertical measurements of an image expressed in pixels. Changing an image’s pixel dimensions affects not only its on‑screen size but also its image quality and its printed characteristics.

Document Size

Change the print dimensions, image resolution, or both.

- Check Constrain Proportions to maintain the current ratio of image width and height.
- If unchecked, the Resample Image Image Size command changes only the physical document size, leaving pixels unchanged.

Click to reset values.

Related topics

- About image & canvas size
- Canvas size