IrfanView, a no-cost (donate-if-you-wish, and if you like the program, I think you really should donate a little something if you can), yuckware-free, small-footprint, extremely versatile, very easy-to-use graphic viewing/manipulation program will do all you're looking for there, and more. Download and install the core app and all the plugins, then read the documentation. The instructions are clear and concise and the interface is quite intuitive.