What's the best way to take wall control points with NavVis VLX?

With NavVis VLX you can take wall control points in addition to ground control points. The recommend way for taking these wall control points is presented below.

Instructions

Note: Avoid fast movements during this process.

To take wall control points around hip height (1m)

1. Hold the device securely with one hand on the handle and the other hand on the frame near the head.
2. Press the trigger button.

To take wall control points above eye level (e.g. >1.5m)

1. Position the device so that both frames rest on your shoulders. 
2. Use one hand to secure the handle.
3. Press the trigger button.