Seeking help with xkbcomp

[wettstae at gmail.com]

> I am using normal, shift, right-alt, and right-alt-shift for four of
> the characters.  That works.  I want to add a mapping for
> right-alt-ctl to get that last character.

> I think the problem I have is that my Group2 keys need to have 3
> levels.

Splitting your four levels across two groups is probably not the easiest
way to go.

You could use the key type LOCAL_EIGHT_LEVEL to implement you want.  If
you do that, your right Alt key should be an ISO_Level3_Shift rather
than a Mode_switch.  See symbols/nbsp for a usage example.  But I wonder
whether how well Control for level selection really works.  In theory, it
is fine, but practise might be different.

If you are willing to an sacrifice an additional key for level
switching, you have many more options.  For example, you could make the
right Control key an ISO_Level5_Shift, and use the type EIGHT_LEVEL.

Or you could use latches; see the de(T3) layout (in a recent
xkeyboard-config) for an example of a eight-level layout accessed with
latches.

Andreas