Writes DirectXUserGlobalSettings = 'SwapEffectUpgradeEnable=1;VRROptimizeEnable=1;'. This is the registry backing for the Windows 11 'Optimizations for windowed games' and 'Auto HDR / variable refresh rate' toggles. It upgrades legacy blt-model borderless/windowed games to the modern flip presentation model — lower latency, tear-free, and lets G-Sync/FreeSync engage in windowed mode. Safe; takes effect on next game launch.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://devblogs.microsoft.com/directx/optimizing-windowed-games/