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Change Image Size and Resolution in Photoshop Elements 10

You can change an image’s size and resolution in a couple different ways. One method is cropping images. You can use the Crop tool with or without resampling images. Another method is using the Image Size dialog box, which you use in many of your editing sessions in Elements.

To resize an image with the Image Size dialog box, follow these steps:

  1. Choose Image→Resize→Image Size.

    Alternatively, you can use the keyboard shortcut Ctrl+Alt+I (Command+Option+I on the Macintosh). The Image Size dialog box opens.

    image0.jpg

    The Pixel Dimensions area in the Image Size dialog box shows the file size (in this example, 9.71M). This number is the amount of space the image takes up on your hard drive. The width and height values are fixed unless you click the Resample Image check box at the bottom of the dialog box.

  2. In the Document Size area, you can redefine dimensions and resolution. The options are

    • Width: Type a value in the text box to resize the image’s width and then press Tab to move out of the field to implement the change. From the drop-down menu to the right of the text box, you can choose a unit of measure: percent, inches, centimeters, millimeters, points, picas, or columns.

    • Height: The Height options are the same as the Width options with the exception of no column setting. If you keep the sizing proportional, you typically edit either the Width or Height text box, but not both. When you alter either width or height, the resolution changes inversely.

    • Resolution: Type a value in the text box to change resolution, and press the Tab key to change the value. When resolution is edited, the Width and Height values are changed inversely (if the Constrain Proportions check box is selected).

  3. If you’re okay with resampling your image to get the desired size, select the Resample Image check box.

    With this check box selected, you can change dimensions and pixels at the same time, which results in either reducing or increasing the number of pixels. When the check box is deselected, the values for dimensions are linked; changing one value automatically changes the other values.

  4. If you select the Resample Image check box, you can choose a resampling method, as well as other resample options.

    In the drop-down menu, you find different choices for resampling. When you select the Resample Image check box, the two check boxes above it become active. Here’s what they do:

    • Scale Styles. Elements has a Styles panel from which you can add a variety of different style effects to images. When you apply a style, such as a frame border, the border appears at a defined width. When you select the Scale Styles check box and then resize the image, the Styles effect is also resized. Leaving the check box deselected keeps the style at the same size while the image is resized.

    • Constrain Proportions. By default, this check box is selected, and you want to keep it that way unless you want to intentionally distort an image.

  5. When you’re done selecting your options, click OK to resize your image.

Resampling Methods
Method What It Does Best Uses
Nearest Neighbor This method is fastest, and the results produce a smaller file size. This method is best used when you have large areas of the same color.
Bilinear This method produces a medium-quality image. You might use this option with grayscale images and line art.
Bicubic This method is the default and provides a good-quality image. Unless you find better results by using any of the other methods, leave the default at Bicubic.
Bicubic Smoother This method improves on the Bicubic method, but you notice a little softening of the edges. If sharpness isn’t critical and you find Bicubic isn’t quite doing the job, try this method. It tends to work best if you have to upsample an image.
Bicubic Sharper This method produces good-quality images and sharpens the results. Downsample high-resolution images that need to be output to screen resolutions and web pages.
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