Is it possible to get Strummie to continue to show the bar lines when you’ve highlighted a subsection to play?
Example if I just want to play the B part of a song I highlight it, and it turns blue but the bar lines disappear. The thing is, if I’m playing just one section over and over it’s because I have an issue with that bit and seeing the bar lines often helps me align my playing up to the correct rhythm. Whilst I KNOW where they are, seeing them instead of remembering where they go means I don’t have to think about where they are and frees up a–sometimes vital-- bit of thinking capacity 
This is fixed in the beta version of Strum Machine, which will hopefully become the main version in the next week or so!
You really are awesome!