Thank you for all the hard work you’ve been putting in lately. Making the best of quarantine. Your work is very much appreciated 
Show / Hide Note Staff or Chord Staff
This is from your 2.9.0 changelog, but I can’t find where to set them (I’m on 2.9.6 right now).
There were some stability issues (dumb stuff where the program freaks about the cursor not being in the right place) so we turned it off while we work on it and do more rigorous testing (wasn’t as simple a feature to add as we thought!). Should be back soon. Glad to know people are reading these release notes 
Dave
This is back as of 2.9.8