Panasonic KX-TD500 System Reference Manual page 1312

Viewing the Display
The display gives you helpful information, such as what you should do now, what you have done, etc..
Both of the KX-T7230 and the KX-T7235 utilize two information lines for programming. The upper line is
called the Message Line and the lower one is called the Function Line.
The Message Line (upper) shows you what you should do or what you should select. It also allows you to
confirm what you have just entered. The display capacity is 16 digits. If your entry exceeds the capacity,
you can shift the display by pressing →
SYS-PGM NO? ->
KX-T7230 Display
← button.
or
← Message Line
← Function Line
13-B-4
SYS-PRG NO? ->
KX-T7235 Display
← Message Line
← Function Line