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11 <up><down><left><right> keys Press this key to go to the next menu, item or selection.
P.S.
When you use <up> and <down> to change current setting, press one
key and you can switch quickly among available settings. To display
the set default value, please press these two keys at the same time.
12 <OK> key
Press this key to confirm your selections on the menu page. This key
is also used to print report/list.
13 <return> key
In menu page, press this key to return the last page.
14 Overview
In case of any error, it is used to identify the indicated position in the
error message.
15 <online> key
Press <online> key to switch the printer to offline state, in which
case, <ready for printing> light will be off and the printer cannot
print anymore. Press this key again and the printer will go back to the
online state (ready for printing).
16 <Information> key
When there is an “i” icon on the screen, press this key to show details
of current situation.
