Gigabyte Nvidia GV-N78TWF3-3GD User Manual page 25

(1) The same on both display (Clone)
Clone mode indicates that both displays in the display
pair show images of the same desktop.
(Dualview)
Dualview mode indicates that both displays in the
display pair function as one virtual desktop. Unlike
Horizontal Span or Vertical Span mode, Dualview
treats each display as a separate device. This means
that the taskbar will not be stretched across displays
as when the application spans displays.
(3) As one large horizontal desktop
(Horizontal span)
Horizontal Span mode indicates that both displays in
the display pair function as one wide virtual desktop.
The width of each display is half the width of the total
virtual desktop width.
(4) As one large vertical desktop
(Vertical span)
Vertical Span mode indicates that both displays in the
display pair function as one tall virtual desktop. The
height of each display is half the height of the total
virtual desktop height.
Horizontal Span Mode
Vertical Span Mode
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Clone Mode
Dualview Mode
Software Installation