Canon LBP7660Cdn Manual page 583

[Show Toner
[Off], [On]
Gauge]
[Set. Comp. Notify] [Off], [1 second], [2 seconds], [3 seconds]
[Scrolling Speed] [Slow], [Normal], [Fast]
is replaced.
Specifies whether the printer should display
the icon that indicates the toner remaining.
Specifies the display time of messages that
are displayed when the setting completes. If
[Off] is specified, no setting completion
message is displayed.
Set the scrolling speed for the message
display on the control panel.