[CM] CMN Turning off rhythmic display?

[Eliot Handelman]

Hello everyone,

I'm trying to notate via CMN a midi piano part proportionately, using
onsets.  

So far it looks good, now if only I can get CMN to suppress 
rhythmic information, ie, to stop displaying flags, rhythmic
divisions, etc., ie what I need is something like (automatic-rhythm
nil),
or (begin-non-rhythmic-beam), or something similar. I assume others
have already been here?

Many thabks for any help or suggestions. 

-- eliot