A|D Y axis rotate, W|S X axis rotate, Q|E Z axis rotate
Mouse Drag look around, Mouse Wheel zoom inout

hold SHIFT fine tuning, L lock the screen, C clear points, R reset camera

When the screen is unlocked, WS AD QE mouseDrag mouseWheel can control the view point.
When the screen is locked, click multi-points on the map to show the min-distance path.

---

All rights reserved. Email: root#lyq.me