The PCV valve on a 2001 Ford Ranger Edge (assuming you mean the 2.5L or 3.0L engine) is a small, usually black, plastic or metal valve. It's cylindrical in shape and often has a single hose barb on either end. It might have a slight indentation or markings on its surface. It's typically located on the valve cover, sometimes near the back, or on a hose running from the valve cover to the intake manifold. It's often connected by short hoses, possibly with clamps.
It won't be huge or obviously different from other components near the engine. To be certain, consult a repair manual or online diagrams specific to your 2001 Ford Ranger Edge's engine (2.5L or 3.0L). Searching for "[your engine size] Ford Ranger PCV valve location" with images will likely yield pictures to help you identify it.
