How to resample images in Photoshop You can use the Image Size” dialog box to resize an image without having to start over from scratch. If your image has been taken by a professional photographer, you should avoid these tips. You can try all the steps, but it's best to follow the advice of photo editing software developers, and use Photoshop specifically designed for the task. If you find yourself with a large image, and you still don't know what to do, try the below tips.