I cannot figure out the way how to keep Chrome browser (or any other app) on the side (left one of the three) monitor. I can run chrome on the side display but once I go to youtube and play the video in fullscreen it is displayed on central monitor with both side monitors blank.
How can I keep fullscreen mode in single monitor instead of being split accross all three?

Yes, I am using Nvidia surround. My system is Windows 10 Pro 64bit, Geforce GTX1080 and each of the 3 displays is connected via display port to this single GTX1080. When i try to configure monitors in DF I see only one screen (7680x1440). Automatically create splits according to Nvidia Surround is checked and if I go to splits I can see 3 same splits 2560x1440 each.
The only solution that I figured to have fullscreen video on single monitor is to close DF completely. Any other solution available?