We have used the hierarchy charts as visual of the entire coded project- it was a roadmap of all the different topics & the most discussed issues. Nvivo 9 & 10 used to be great, they had an option of colors red/yellow/green-so we often used the red to talk about the ‘hot” topics. Also, fonts were black so easier to read across diverse groups. Also, I would allow to word wrap feature in displaying this graphic would help/ This particular graphic is an important way to communicate the scope and depth of the overall project without going into all the details. I hope that you can work on updating this graphic.