Cubes Without Borders Mod FAQ
10 questions players actually ask, answered.
How do I turn on borderless fullscreen in Minecraft?
Open Options, then Video Settings, and change the Fullscreen setting to the new Borderless option. The game will switch to a 
borderless fullscreen window immediately, and it will keep running when you click on another monitor.
borderless fullscreen window immediately, and it will keep running when you click on another monitor.Why does Minecraft still minimize when I click my second monitor?
You are probably still in regular Fullscreen mode rather than Borderless. Set Fullscreen to Borderless in Video Settings, or launch with the --borderless flag, and the window will stay visible when it loses focus.
How do I make Minecraft always start in borderless mode?
Add the --borderless startup flag to your launcher's game arguments or JVM arguments. The game will then launch directly into a borderless fullscreen window without you changing the setting each time.
borderless fullscreen window without you changing the setting each time.Where is the cwb.json config file?
It sits in your Minecraft config folder alongside other mod configs. Open it with any text editor to change fullscreen types and other borderless options, then restart the game for changes to apply.
What fullscreen types can I choose in the config?
The cwb.json file offers several fullscreen types for advanced users, letting you pick how the borderless window is created and sized. If you are unsure, leave the default, since it works on Windows, macOS, and Linux.
Does borderless mode add input lag?
No, the mod is designed not to add extra input latency, so gameplay stays responsive. If you notice lag, check that your GPU driver is not forcing a different fullscreen mode.
Can I use YACL or Cloth Config to change the settings in-game?
Yes, if you have YACL or Cloth Config installed, the mod's options appear in the config screen so you can adjust borderless settings without editing cwb.json by hand. Otherwise, edit the file directly.
Does Cubes Without Borders work on macOS and Linux?
Yes, the mod supports Windows, macOS, and Linux for a consistent borderless experience. The available fullscreen types may differ slightly by platform, so check cwb.json if the default does not behave as expected.
Why is my borderless window not covering the whole screen?
Your resolution or fullscreen type in cwb.json may not match your monitor. Set the game resolution to your monitor's native resolution and pick the default fullscreen type, then restart.
Does this mod conflict with other fullscreen or window mods?
It can conflict with mods that also control the game window or fullscreen state, since both try to manage the same setting. Remove or disable the other window mod, or use only one fullscreen method at a time.