To change the unit of measurement for the pixel dimension, click the triangle next to Dimensions and choose from the menu.

After clicking, the percentage of magnification briefly appears near the bottom of the preview image. Alt-click (Windows) or Option-click (Mac OS) to reduce the magnification.

To change the preview magnification, Ctrl-click (Windows) or Command-click (Mac OS) in the preview image to increase magnification.

To view a different area of the image, drag within the preview.

To change the size of the preview window, drag a corner of the Image Size dialog box and resize it.

Do any of the following to modify the image preview:.

Click the link icon to toggle the Constrain Proportions option on and off.

From the Dimensions pop-up menu, choose different units of measurement to display the dimensions of the final output.

The Scale Styles option is turned on and off from inside the gear menu in the upper right corner of the dialog box.

Resizing the dialog box resizes the preview window.

A window displays the preview image from the resizing parameters.

In addition, the Photoshop Image Size dialog box has been updated for ease of use:

Original uncropped image (left) sharp resized image (right) To resize an image use the Image Size command in Photoshop that includes a method to preserve details and provide better sharpness while enlarging images.

How to resize an image in photoshop