The ViewSonic X1 projector has several built-in security features to prevent unwanted operations. This tip will introduce the way to set up key lock on the ViewSonic X1.
With the control keys on the projector locked, you can prevent your settings from being changed accidentally (by children, for example). When the Panel Key Lock is On, no control keys on the projector will operate except Power.
Now your projector is safe from accidental setting changes, or mal operation by children.
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How to Use ViewSonic X1 Security Slot?