Optelec ClearView GO Manuel D'utilisation page 18

Optelec
5. Hot Keys & Features
5.1. Line & Mask
Press and hold the Super Function Key (⑦) to activate Line & Mask.
When Line & Mask is active, the direction key and wheel of the Super
Function Key (⑦) works as follows.
 Left & Right◀▶ : Choose the function.
1 ) Horizontal line
3 ) Horizontal mask
 Up & Down ▲▼ : Increase or decrease the thickness of a line and
the distance between masks.
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2 ) Vertical line
4 ) Vertical mask
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