How to Screenshot on BlackBerry

Many times, in order to get help on a forum or service, or to tell a friend how to do something with a computer, the screen capture images or "snapshots" are invaluable. With the increasing complexity and functionality of mobile phones, this resource is also useful in the case of our favorite gadgets.
Last night, surfing the support page for the BlackBerry out of curiosity (which is what has to

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