To change the pixel dimensions of an image--

1. Choose Image > Resize > Image Size.

2. Make sure that Resample Image is selected, and choose an interpolation method.

3. To maintain the current proportions of pixel width to pixel height, select Constrain Proportions. This option automatically updates the width as you change the height, and vice versa.

4. Under Document Size , enter values for Width and Height in inches. Standard photo sizes are 5”X7” and 4”X6”

The new file size for the image appears at the top of the Image Size dialog box, with the old file size in parentheses.

5. Click OK to change the pixel dimensions and resample the image.