IFD400 Series Pilot Guide
Aux Subsystem 4-23
The CLR key is used during editing as a backspace key.
However, if the value being edited is empty, one more press of
the CLR key will cancel the edit. At any time during the edit,
pressing the Cancel LSK or pressing the virtual keyboard red-X
will also cancel the edit.
Pressing the right knob button, the ENTR button, the ENTR key
the virtual keyboard, or the Enter LSK will accept the edited value
as the new setting.