Vuzix STAR 1200XLD AR System User Guide - Manual (Page 20)

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§ Put on your eyewear positioning them as they will normally be used – upright, at eye level
and facing your computer – and then press the “Set Zero” button.
The Set Zero button establishes the Tracker’s home or centered position. As you move
your head you will see the indicators and values in the Yaw, Pitch and Roll indicators
reflect movement relative to that centered position.