Assuming you have installed and run xinput_calibrator, now you need to map the input to output for your dual monitors. This is not a calibration, that part is done. This step tells the desktop's graphical interface what input ID goes to what output. Open a command prompt and type xinput. The list of input devices shown will show the ID unique to each device. Record the ID for each monitor. Now run the command :
____ xinput --map-to-output device_ID connection
____ xinput --map-to-output device_ID connection
For example, say in the xinput list you see Elo touch monitor has an ID of 14 and is connected by DVI and Elo touch 2 is ID 12 and connected to VGA.
The commands would look like this:
xinput --map-to-output 14 DVI
xinput --map-to-output 12 VGA
Note: The touch configuration will remain persistent through reboot as long as the monitors are not disconnected. When a disconnect occurs, check the ID map and re-run the -map-to-output command.