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so i remapped some keys using xmodmap, specifically i remapped one key to the ±-sign. I want to have this key as my escape for GNU screen. I tried adding the following lines in my .screenrc:

escape ±

escape ±±

but it doesn't work.

from the GNU Screen manual:

escape xy

Set the command character to x and the character generating a literal command character (by triggering the "meta" command) to y (similar to the -e option). Each argument is either a single character, a two-character sequence of the form "^x" (meaning "C-x"), a backslash followed by an octal number (specifying the ASCII code of the character), or a backslash followed by a second character, such as "^" or "". The default is "^Aa".

i do not understand how the default mapping is ^a when the line in screenrc is ^Aa.

Can someone explain this please?

Thank You

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So:

^A means that the escape sequence is control-a

a means if i need to send control-a to my shell , i need to type control-a following by a

You can test by following this example

screen -e "^Ap"    #  start screen with escape set to ^Ap

bash               # to be sure we are in bash

set -o emacs       # we switch to emacs mode

echo hello         # we have some in history

control-p or arrow UP

your cursor must be at the end of the previous command must be echo hello

control-a follow by p

you cursor must be at the begin of the line ( you send ctrl-a to the shell )

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