I've been toying around with the Compose key, looking at mostly
at /usr/share/X11/locale/en_US.UTF-8/Compose. I'm learning
how to type in some special characters I use occasionally.
One character I'd like to use is plus-minus, '±', Unicode 00B1.
I'm able to use my Multi-Key and the + and - keys located on
the number row to the right of the 0 key on my keyboard to display ±.
But I'd also like to be able to use the + and - keys on my number
pad (the numeric keys to the right of the regular QWERTY
I've verified I can use the numbers on the keypad for compose.
For example, as as test, I verified I can use KP_5 and KP_6 to
display the ± sign. I just guessed that the names were KP_5
and KP_6; I couldn't find anything documenting that.
But except for the numbers, which are all called KP_<number>,
I can't figure out what the correct names of the arithmetic
operator (/,*, -, and +) keys on the number pad should be called.
I've just tried guessing some names like KP_plus, KP_add, KP_+,
but they don't work.
Does any know how to use the arithmetic operator keys on the number
pad with compose?