This article explains how to calibrate/align Elo touchscreens

Please follow the below steps to calibrate an Elo touchscreen monitor. 

1. Get to the Alignment screen.

2. If Windows XP and no Elo icon, click the "Switch to Classic View" button on the left
3. If Windows 7 and no Elo icon, look for “View by: Category” text toward the upper right; click it and select "Small icons"
4. Touch and release the upper left target; the target should jump to the lower right.
5. Touch and release the lower right target; the target should jump to the upper right.
6. Touch and release the upper right target; a check screen should appear.
7. Touch and release the green check mark; the check screen should disappear.
8. The cursor should now jump to the point of touch.
9. If the Elo Control Panel is open, close it and the Windows Control Panel.