Will window open fully when wanted?

A quick learner from Hawaii says:
I understand how these work as ventilating locks, but do they allow for the window to be fully opened when wanted, or in an emergency?
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Tom from SWISCO responded:
Yes! You can adjust the knob to two different positions. See the diagram below.
Demonstration of how 20-013 is operated
Demonstration of how 20-013 is operated
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