TOPIC: How to modify the Alt-GR key for a Danish keyboard

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Introduction:
Here's the guide I used to map the Alt-GR key for my Danish keyboard.

First of all you should understand which keycode is assigned to which key. To do this:

# xev

... and press the key you want to modify. You'll see something like "keycode XXX". For example I wan to remap "apple" as "AltGr". So I give:

# xmodmap -e "keycode 115 = Mode_switch"

... that modifies things temporarily and try my setting. If everything works fine, I create in the home directories a .Xmodmap file in which I write:

keycode 115 = Mode_switch

... and since I use gdm I create a file named /etc/X11/Xsession.options in which I write:

allow-user-xmodmap

I save and reboot: everything works, mission accomplished.

This HOWTO was written by Frederik Heurlin Aidt, Copenhagen, Denmark