Suggestion that a double click to a bullet have an action. My suggestion would be to expand/collapse all children, or zoom in. But there could be other options that would be useful for other.
Could be interesting if you were to uncheck ‘Use Bullet Point To Zoom In’:
- one bullet click could expand/collapse parent and double click would expand/collapse children.
- one bullet click could expand/collapse parent and double click would zoom in. And, in this scenario, there would not be need for the floating ‘zoom in’ icon.