Google ANDROID 2.3.4 사용자 설명서

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Android basics
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AUG-2.3.4-105
Android User’s Guide
Context menus
Context menus contain tools that apply to a specific item on the screen. You open a 
context menu by touching & holding an item on the screen. Not all items have context 
menus. If you touch & hold an item that has no context menu, nothing happens.
When you touch & hold some items 
on a screen...
...a context menu opens.