Just released v5.9 of the Mac app. This adds support for an outline view of the map (down the left edge of the screen) - see below:
1 = Show/Hide the outline view (⌘+SHIFT+O)
2 = Expand/collapse the branch
Many keyboard shortcuts will also work:
- 0-9 and . to show/hide sub branches
- RETURN/TAB to create new topics
- Arrow keys to navigate
Any questions, suggestions or issues just let me know and I'll do my best to help.