What is the best practice for setting up multi-monitor support in Unity to allow players to move the game window to another monitor?

Implementing Multi-Monitor Support in Unity

Enabling multi-monitor support in Unity requires a combination of Unity’s scripting capabilities and understanding display settings within the player’s operating system. Below are steps and considerations to achieve optimal multi-monitor support:

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1. Using Unity’s Display Class

• Access Displays: Utilize the Display class to access all connected displays. This can be done using Display.displays to query the available displays.
• Activate Additional Displays: Initially, Unity activates only the primary display by default. Activate additional displays with Display.displays[index].Activate(); where index is the zero-based index of the target display.

2. Adjusting Resolution and Position

• Set Resolution: Use Screen.SetResolution() to change the game resolution dynamically to fit the desired display dimensions.
• Positioning the Game Window: Unity does not natively support direct window placement, especially in fullscreen mode. However, switching to windowed mode and employing Windows API through plugins for precision is a workaround. Consider using keyboard shortcuts for players to move windows manually.

3. Player Preferences and Settings

• User Settings: Provide in-game options to choose which monitor to display on. Store these preferences using PlayerPrefs to remember user settings between sessions.
• Dynamic Adjustment: Listen for display changes via scripts to dynamically re-adjust settings if monitors are plugged in or removed while the game is running.

4. Best Practices

• Testing: Always test your game across various multi-monitor setups to ensure compatibility and a smooth player experience.
• Documentation and Support: Clearly document how players can switch monitors and any troubleshooting steps in case of issues.

5. Real-world Integration