There doesn't seem to be a Meta modifier for the
keymap, only Ctrl Shift and Alt. Meta is used a lot on
Macs, in most of the chords where Ctrl is used on Windows.
This means that you can't set up the standard bindings
Meta-X/C/V for cut/copy/paste, and you have to guess
whether you're in something that has been extended by J
to use Ctrl-X/C/V or in one of the swing fields where