The Merged Display feature merges the displays from two portrait-mode monitors and presents them side-by-side on a landscape-mode monitor.
NOTE: Merged
Display is supported only on Windows 10 and NVIDIA Maxwell and later GPUs.
When Merged Display is enabled, the following features and controls are disabled:
NVIDIA Surround, Mosaic Mode, or Smart Clone mode
Display operations on the source displays such as rotation, or changing resolutions or color formats
All operations on the target display
All displays (source and target) must be on the same physical GPU.
Source displays must use the same native resolution and timing.