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1 Back: Returns to the previous screen.
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2 Cancel: Stops the current operation, restores default settings.
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3 Selection button: Contextual button that changes depending on what is displayed on the screen.
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4 Up button: Use this button to navigate menus and select number of copies.
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5 Down button: Use this button to navigate menus and select number of copies.
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6 OK: Confirms the current selection.
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7 Wireless status light and button: Blue light indicates wireless connection. Press the button to view wireless status and menu options. Press and hold down the button until light blinks to start Wi-Fi Protected Setup (WPS) push button mode.
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8 ePrint button: Pressing button displays the Web Services Menu where you can view printer's email address and make ePrint settings.
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9 On button: Turns the printer on or off.
Figure : Graphic - The control panel of the HP Deskjet 3520 e-All-in-One series
