This generally depends on the make of your phone, not the operating system (Android).
On most Android phones however, you can take a screenshot bu using your whole hand, place it on the left side of the screen then swipe all the way to the right. You will hear a click if it is done right and the image will save in your gallery on the phone.
If you're talking about the MMO Aion: The Tower of Eternity, then using your Print Screen key will take a screenshot. Using F12 beforehand will disable your UI in order for you to take a clean screenshot.
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To take a screenshot on a Windows computer press the keyboard key that is marked 'PrtScn' - you will find it immediately to the right of the Function keys. Open an image editing program, such as Paint, and use the Paste command - using either the Edit... Paste menu or Control + v on the keyboard. You will now have a picture of the entire display as it existed when you took the screenshot. If you only want to copy the current window or an active dialog box hold down the keyboard Alt key as you take the screenshot.
There are a couple of ways you can screen capture with a Motorola electrify. You can download an app that will do the screen capture for you. Or, you can hold down the power and volume buttons simultaneously, and this will accomplish the same task.