This is a
dual-monitor system configuration
The program generally detects dual-monitor systems
by itself and accommodates its appearance automatically. However, if
your dual-monitor system does not work entirely through Windows and
relies on video drivers for that functionality, then the program will
most likely be confused. By enabling this option you will explicitly
tell the program that you have a dual-monitor system. This solution
should work fine for majority of dual-monitor configurations, but there
is no guarantee it will work in all cases.
NOTE: You have to position both
screens so they are leveled at the top. Any other set up will cause the
program's interactive desktop feature to not work correctly.