Position 0 | Straight visual axis, without gazing to the computer screen. |
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Position 1 | Maximal extension of computer screen (38 cm upper edge of screen) |
Position 2 | Second extension of computer screen (33 cm upper edge of screen) |
Position 3 | Second extension of computer screen (31 cm upper edge of screen) |
Position 4 | Common notebook screen position (27 cm upper edge of screen) |