Canon BJC-70 User Manual page 97

Ready to change settings—Pressing the button puts the operator
MENU
panel into Menu mode. This mode allows you to change the printer's
various modes. The display panel looks similar to this:
You can select Menu mode only when the printer is not receiving data
and the Data indicator symbol is off.
Printing is disabled—If a printing problem occurs, such as a paper jam,
and printing is disabled, the operator panel shows the cause of the
problem. The letter , , or , and a number are displayed alternately
E C F
in the lower right corner of the display.
See Chapter 8, Troubleshooting, for details.
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Chapter 6 Using the Operator Panel