Is there an explanation for the color settings for Destination Border, Off Lister Border, and Source Border? Some affects are apparent but others don't seem to change anything. (The settings are under Display\Other Colors.)
If you have two single-display windows open then one will be the source and the other the destination.
If you have more than two then all the others will be "off", meaning they are neither source nor destination.
See the video on working with multiple listers, in the forum's tutorial section, for more.