From what I can see, there are 2 types of strings. About 6 thick, bright ones, and 10-15 or so thin, dark ones. When he flashes, some bright orangish...
I had to enable 'Resize display to fill window size' under Window Properties and works fine now in both portrait and landscape, I incorrectly assumed...
Sometimes when I enter the Activate group (or Deactivate Group) dialog, it displays the group tree in a sensible way, with the folded/unfolded status...