Zoom In / out with mouse wheel or pinch with your fingers
Drag the canvas, not the nodes yet ( since works with less than 80 elements )
Open / close main nodes ( recomputing positions might shake )
Use the Collapse All / Expand All upper left button to navigate throught the nodes
Use firefox if chrome js engine seems laggy ..
/** Sorry for the inconvenience .. takes up to 4 sec to recompute positions .. haven't found the solution yet for this much elements repelling each others .. Still, works better with firefox js engine **/