What is the [Alt#} command?
You say you access the area where it wants the ? and esc3.? So you get into the Options Menu.
You say you type disp and I assume you see all the settings.
from the prompt after the disp is complete type:
??? btext TT4 state Bat=^V and Temp=^T??????????????????????????????? {or your message before the information)
the TT4 should respond with something like:
?? btext was {old BText comment}
?? btext now TT4 state Bat=^V and Temp=^T
power cycle the TT4 and you should be good
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Robert Giuliano
KB8RCO