This article explains how to enable spanned display mode in the Elo Windows driver

The below information is for setting up Spanned video mode using the Elo Multi-Touch driver in Windows.

The “Spanned display mode” option is found in the "Common Settings" of the Elo Windows driver and is only available when a single “spanned” monitor is detected on the system. If the system is not configured in “spanned” mode, this option will be grayed out.



Enabling the “Spanned display mode” option followed by clicking the “Calibrate Touch Screens” button in the main EloConfig page will display a configuration window asking you to provide the number of rows, columns, and monitor orientation in the spanned setup. After this information has been entered, click the OK button and you will be able to calibrate each supported touch monitor in the setup. Note that in order to be able to calibrate your monitors in the spanned set up; all monitors need to be set up in the same orientation.


To calibrate Elo touch monitors in video span mode, user needs to make change to the EloOptions.ini to enforce 3-point driver calibration as following:
[Calibration]
DriverCalibration = 1
This will invoke the 3-point calibration for all Elo touch monitors.

• To enable Spanned mode BEFORE installing the Elo driver, you will need to set DriverCalibration to 1 in the EloOptions.ini, then calibrate.
• To enable Spanned mode on-the-fly AFTER Elo driver installation, you must set DriverCalibration to 1 in the EloOptions.ini and recalibrate. You must do this with Admin privileges for it to work. 

See related article: Spanned Display Mode Not Working with ForceMouse Mode