Epson EMP-S4 User Manual page 6

Projector Features
Colour Mode
You can enjoy images of "Photos", "Presentations", "Games", and so on, in
the optimum colour tone by choosing the most suitable mode for your
surroundings.
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Security Function
Manage users with password protect
You can set up a password to restrict the use of the projector.
Operation lock stops the use of all control panel buttons except for
the Power button
This can prevent your settings being changed by accident or on purpose,
when using the projector at an event, at a school, and so on.
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