With the release of Windows 10, we added Full s creen Optimizations – which takes full screen exclusive games and run s them instead in a highly optimized borderless windowed format that takes up the entire screen. This means the size of window can be adjusted to fill the entire screen w hile other processes still run in the background. In a borderless windowed mode, the game is still running in a window but has no border around it. The D esktop W indow M anager (DWM) has control of the display, while the graphics resources are shared among all applications, unlike in a Fullscreen Exclusive environment. In windowed game mode, the game is deployed in a bordered window which allows other applications and windows to continue running in the background. Fullscreen Exclusive mode gives y our game complete ownership of the display and allocat ion of resources of your graphics card.

Games on PC generally offer three different types of display modes: Fullscreen Exclusive (FSE), W indowed, and B orderless W indowed. TLDR – Demystifying Fullscreen vs Windowed Mode

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