Okay, tried to edit the cua.bind file and failed.
This I found #\bind "C-k" "font-noun" I got rid of the '#' and restarted Lyx, hoping that a C-k would toggle a noun, but alas, it didn't ... What magic is needed here to let a C-k toggle the noun ? Cheers -Ralf p.s. Lyx1.6.3 on WinXP and c:\Program Files\LyX 1.6.3\Resources\bind\cua.bind