This library supports any number of displays when the Position operation is used.  
Note: do not confuse this with the basic Rows and Cols that allow you to place a number of plots in a single Figure.

In the example here, there are three display windows being used:

The names of the displays have been named as shown below reference the 3 displays above.

Main=1

Left=  2

Top=  3

The [Side Margin] and [Top Margin] values will be set by default but can be adjusted as needed.

[Reset] can be used to reset the displays if for some reason it was configured off on some unknown location.

The default display can  be set as part of the Default Configuration