Originally Posted by Heru-kun
I usually use it in combination with alt key to use the numpad, bcs of the ascii characters in programming or chatting with ppl. It's a pain in the ass to look for an ascii table and copy-paste every character needed...
The Fn key itself is still hardware -- it just gets you the numpad. What you seem to be asking, then, is how to use the alt+### trick to type ASCII characters.
I'm not exactly sure how to do that, but if you're only using a few characters, and if you use KDE, you can add the Character Selector applet to the panel. Configuring it is easy: you just put whatever characters you want to be able to type in a textbox, and they each get placed in the clipboard with a single click (maybe speeds up the whole select, copy, paste routine a bit.)
I'm googling around a bit (you should as well
) to see if I can find something better.