NEC WT615 - Manual (Page 44)

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3. Projecting an Image (Basic Operation)
3. Touch the center of the mark lightly with the electronic pen.
The [Parallel Detect] screen will be displayed.
Touch
When the marker is in the center of the gauge, go to Step 6.
When the marker is not in the center of the gauge, it means that the projector and the screen are not parallel to
each other. Go to Step 4.
4. Rotate the projector right or left so that the projector is parallel to the screen.
Screen Screen
Top view
[The marker is on the left side] [The marker is on the right side]
Rotate the projector right. Rotate the projector left.
5. Touch the [Retry] button with the electronic pen.
Repeat Steps 2 to 4.
6. When the marker reaches the center of the gauge, press the button "A" on the electronic pen.
The [Tilt Indicator] screen will be displayed again.
Button “A”
7. Press the EXIT button three times.
The menu will be closed.