by Julieanne Kost
To use the dimensions of one open image to crop another open image, select the open document with the desired crop (width, height, and resolution) and click the “front image” button in the Options bar. This will enter the height, width and resolution for the document in the Options bar. Then, switch to the document that needs to be cropped and drag out the crop tool. The aspect ration will be constrained while dragging the crop and, when applied, the image will be resized to the desired width, height and resolution.