This totally FREE App presents a set of 5 diagrams of the Canon Rebel T2i Digital SLR Camera. Each diagram has red dots on it. The user is shown the name of a part and must identify its location on the diagram. The diagrams cover the Front, Back, Top, Viewfinder and Mode Dial of the camera. Each screen has a "Study" button which allows the user to view the labeled diagram for learning purposes. Users will learn the name and location of the parts of the camera as well as the meaning of icons on the screens and dials. Many of my photography books have instructions for taking pictures under special conditions. They would often say to press a button or turn a wheel but it is hard to do if you do not know where the parts are. This App has been played on the Samsung Galaxy S8+ phone, the Kindle Fire HD 7" tablet and the Samsung Tab S2 10" tablet. When playing on a small screen, it is recommended that a stylus be used. The App does not ask for any permissions upon installation and does not need the internet to run. There are no ads or in-app purchases. No registration. Totally free! Enjoy. I have a number of free apps on Google Play Store. They can be found by searching for "rtcgames".