How Alt+Enter Exclusive Fullscreen & Flip Model Presentation works in ClientAppSettings.json
Lets Direct3D 11 enter lower-latency presentation mode when pressing Alt+Enter in fast-paced rhythm or FPS titles.
When you adjust **FastFlag Editor** inside Bloxstrap, the bootstrapper writes `FFlagHandleAltEnterFullscreenManually` into `ClientSettings\ClientAppSettings.json` before `RobloxPlayerBeta.exe` initializes its renderer.
Recommended values and stability tips
- **Accepted values:** `False (allows Alt+Enter D3D11 fullscreen)`. Stick to the built-in GUI preset under Engine Settings unless you are testing a specific JSON override.
- **Resetting:** If a custom value causes visual artifacts or a startup crash, use Reset FastFlags to default.
- **Installer:** Download the latest Windows build of Bloxstrap from /download.
Frequently asked questions
What FastFlag does "Alt+Enter Exclusive Fullscreen & Flip Model Presentation" control?
It manages `FFlagHandleAltEnterFullscreenManually` inside `ClientAppSettings.json`, accessible directly via **FastFlag Editor**.
Will this setting reset when Roblox updates?
No. Bloxstrap rewrites `ClientAppSettings.json` into the new Roblox version folder on every launch.