Casio OMC811 Manuale Utente

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Basics
Working with menus
There are two kinds of Android menus: option menus and context 
menus.
Option menus
Option menus contain action items based on the current screen or 
application, not to any specific item on the screen. You can open option 
menus by tapping the Menu key 
. Not all screens have option menus. 
If you tap the Menu key 
 on a screen with no option menu, nothing 
will happen.
Some screens have more option menu items than can fit in the main 
menu. Tap More to open a menu of additional items.
Option menus contain items that 
apply to the current screen or to 
the application as a whole. 
Context menus
Context menus contain tools that apply to a specific item on the screen. 
You open a context menu by touching and holding an item on the 
screen. Not all items have context menus. If you touch and hold an item 
with no context menu, nothing will happen.