I am using Adobe Photoshop Elements 10 for the Mac (running Lion). I want to adjust the image resolution without changing the image size.
When I go to Image -> Resize -> Image Size, the height, width and proportions are constrained together. The "Constrain Proportions" box is checked. I cannot uncheck it. Clicking on the chain icon does not help either. The image is a JPEG. Does anyone know what I have to do to be able to unconstrain proportions? Thanks in advance for your advice!