For example, pressing third level chooser (not compose key, as I posted earlier) + v = @. However, I want third level chooser + v to print #. Is there a way to accomplish this?
This technique is known as "composing a key". I write Spanish but on US-keyboard layout,and I use
ALT+ any number to make accents, but this also hold many others characters as well.
https://help.ubuntu.com/community/ComposeKey should help you on that - but scroll little further down until you see 'third level'.
Your link shows how to change compose key combinations. I've tried this (copying and modifying .XCompose, and adding "export GTK_IM_MODULE="xim"" to .Xsession). The changes had no effect. However, I didn't want to change the compose key combinations, but rather a specific third level key. (I thought that the compose key and third level chooser are the same thing.) I've modified my original question accordingly.– stannyMar 22, 2015 at 22:17
I managed to adjust the compose key combination (copied utf8 compose table to ~/.XCompose and modified it to suit my needs, and added "xport GTK_IM_MODULE="xim"" to the beginning of ~/.profile). Do you have any idea if I can do the same for the third level modifiers?– stannyMar 22, 2015 at 22:37