There are several ways to zoom in on Photoshop. You can use the Zoom tool, your mouse scroll wheel, or the zoom percentage box.

You need to both get in close and see the big picture to do quality editing, and there's a range of options for that in Photoshop.

Launch Photoshop and open the photo with the washed-out colors. Click the "View" menu and choose "Fit on Screen" to maximize your view of the picture. Zoom in on the first washed-out area, such as ...