making ninetuplets

Same question. I need to make 11-plets. Do I have to do 6-plet plus 5-plet? It's fairly close for playback, but not quite accurate, and of course it isn't typeset as it should be. Since high-number -plets are difficult to play, MuseScore is an excellent way to learn them, but it seems to work only up to 9-plets (by using the keyboard Ctrl-9 command). Once you get beyond 9, you need two digits.