using v-vocal to correct a non-detected area

Again, apologies if this is a repeat.  Usually when I use a forum I search for previously asked/answered questions but I haven't figured out how to do that effectively here.
 
I have a V-Vocal clip.  There is a section where audio is clearly visible in the waveform display but it's not showing a detected pitch.  The voice at that point sounds fine to me, but that's neither here nor there.
 
I want to be able to apply shift/correction to those notes but V-Vocal won't let me "draw" or anything in that region.
 
Is there a way to force detection?  To force a correction?
 
Thanks,
 
CAF

That's an interesting idea.  But the audio isn't very low level in that region at all.  I can see a nice healthy wave and can hear it clearly and it just sounds like pretty normal singing.
 
What V-Vocal is doing is allowing us a convenient way to express a pitch change to be applied. 
 
I gotta admit I don't have a good mental model of what it's doing wrt the formant.  Is it applying a resonant filter with a center somehow based on the main pitch?
 
But what I need is a way to explicitly draw the curve of the pitch change I want regardless of the detection it did.  I was hoping for a mode where I could just draw the desired delta.
 
CAF