Dell S520 Guide D'installation page 13

Part H: Reset All Touch
Settings
When auto or manual "calibrate touch and
touch area" settings still are incorrect, you can
to execute the Reset all touch settings option
to reset all settings to its factory default.
Executing driver, click the
Advanced Settings menu, click the Reset all
touch settings option to re-sensitize laser
curtain by restoring the initial setting.
icon, and go to
Part I: Touch Sensor Adjust
When your touch sensor setting is incorrect,
you can to execute the Adjust touch sensor
option to manual adjust touch sensor area.
Executing driver, click the
Advanced Settings menu, click the Adjust
touch sensor option to manual adjust touch
sensor area.
Set Up Laser Touch on Your Projector
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