I come from a Windows and physical keyboard world, so things that are simple in Windows seem very complicated or undoable in iOS. For example, shutting down an App (as simple as clicking the red X in the upper right corner of a window) didn’t seem possible in iOS.

Find below some shortcuts that show how to do the “impossible”:

• Go to Standby: Press the Standby button shortly.
• Wake up from Standby: Press the Standby button shortly.
• Go to Home screen: Swipe up from the bottom.
• Shutdown the device (Power off): Press the Standby and the "Volume Down" buttons for several seconds until “Slide to power off” appears. Then slide to the right and the device will power off.
• Switch on the device: Press the Standby button shortly.
• Reboot the device: Press the "Volume Up" button shortly, then press the "Volume Down" button shortly and then press the Standby button for several seconds until the screen goes black and the Apple logo appears.

• Switch to a recently used App: Swipe from the bottom middle of the screen to the right.
• Close an App completely: Swipe from the bottom up to about the half of the screen: All the open apps will appear. Tap an app and hold until the red "One way" sign appears on the left upper corner of each app. Tap on the red sign and the app will close completely (will be removed from memory).
• Delete an App: On the Home screen, tap on an App icon for several seconds. The App icons will start to shake. Tap on the small X on the upper left corner of the app icon to delete it.
• Take a screenshot: Press and hold the standby button and press the "Volume Up" button shortly. The screen will go white shortly and you will hear a shutter. Release the standby button. The screen shot can be found in the Photos app under the Camera Roll.