Toshiba E-STUDIO 3511 Operator's Manual page 21

Clearing and Canceling the Function Selected
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If you again press any button that is highlighted or shaded, the function selected is cleared. To quit or cancel
the settings, press the [CANCEL] button or the [ALL CLEAR] button for the address book screen at the
bottom on the touch panel.
The greyed out buttons on the touch panel cannot be selected.
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