Game Guides
How to Fullscreen a Game — Complete Guide for PC Gamers
Quick Answer
✅ Press Alt+Enter on Windows or Cmd+Ctrl+F on Mac to toggle fullscreen in most PC games instantly.
✅ If the keyboard shortcut fails, go to the game’s Video/Graphics settings and change Display Mode from Windowed to Fullscreen or Borderless Windowed.
✅ For stubborn games, edit the game’s config file or use Windows compatibility settings to force fullscreen mode.
Key Takeaways
- ✅ Alt+Enter is the universal fullscreen toggle for most PC games
- ✅ Borderless Windowed gives fullscreen feel with faster alt-tabbing
- ✅ Some games need config file edits to enable proper fullscreen
- ✅ Windows scaling and resolution mismatches can block fullscreen
- ✅ GPU driver settings can override game display modes
- ✅ Exclusive fullscreen gives best performance, borderless gives best convenience
Introduction
Knowing how to fullscreen a game properly can transform your gaming experience. Whether you are playing on a low-end laptop or a high-end gaming PC, running a game in fullscreen mode eliminates distractions, reduces input lag, and often improves frame rates. Many gamers struggle with games that launch in windowed mode, refuse to go fullscreen, or display black bars around the edges. This guide covers every method to force fullscreen mode — from simple keyboard shortcuts to advanced config file edits. If you have ever alt-tabbed out of a game only to find it will not go back to fullscreen, this article will fix that for good. For more gaming tips, check out How To Set Fullscreen On Gta 5 Permanent… for related guides.
Fullscreen Modes Compared
| Mode | Performance | Alt-Tab Speed | Best For |
|---|---|---|---|
| Exclusive Fullscreen | Best | Slow | Competitive gaming |
| Borderless Windowed | Good | Instant | Streaming, multitasking |
| Windowed | Lowest | Instant | Debugging, old games |
| Fullscreen Optimized | Good | Fast | Windows 10/11 default |
Recent Changes Affecting Fullscreen in 2025-2026
Windows 11 24H2 introduced changes to how exclusive fullscreen is handled, with the OS now applying Fullscreen Optimized mode by default for most DirectX 12 games. This can cause issues with older games that expect true exclusive fullscreen. NVIDIA driver 560.xx and later added a per-game fullscreen override in the NVIDIA Control Panel, giving users more control. AMD Adrenalin 24.x drivers also added a Borderless Gaming toggle. Many games released in 2025-2026 now default to Borderless Windowed instead of Exclusive Fullscreen, following the industry trend toward faster alt-tabbing.
Quick Wins vs Deep Fixes
| Quick Wins (Under 1 Min) | Deep Fixes (5+ Min) |
|---|---|
| Press Alt+Enter to toggle fullscreen | Edit game config files manually |
| Change in-game Video settings | Adjust GPU driver overrides |
| Set correct monitor resolution | Disable Windows fullscreen optimizations |
| Update GPU drivers | Create custom resolution in GPU control panel |
Fix 1: Use the Alt+Enter Keyboard Shortcut
Skill Level: Beginner
Overview: The fastest way to toggle fullscreen in almost any PC game is the Alt+Enter keyboard shortcut. This works in the vast majority of games built on DirectX, OpenGL, and Vulkan.
What Is This About?
Alt+Enter is a Windows-level command that tells the active application to switch between windowed and fullscreen modes. Most game engines recognize this command natively.
Why It Stands Out
It requires no menu navigation, no config editing, and works in nearly every PC game ever made. It is the first thing every PC gamer should try.
Steps:
- Launch your game and wait for it to fully load
- Press Alt+Enter simultaneously
- The game should switch to fullscreen mode immediately
- Press Alt+Enter again to toggle back to windowed if needed
Why This Works: The Windows operating system sends a display mode change request to the game engine. Most engines handle this by swapping from a bordered window to an exclusive fullscreen swap chain.
Related: Why Is My Game Lagging Ps4 Fixing A Lagg… covers more display troubleshooting tips.
Fix 2: Change Display Mode In-Game
Skill Level: Beginner
Overview: Every PC game with graphics settings includes a Display Mode or Screen Mode option. This is the most reliable way to set fullscreen permanently.
What Is This About?
The in-game display mode setting controls how the game renders to your monitor. Options typically include Fullscreen, Borderless Windowed, and Windowed.
Why It Stands Out
Unlike keyboard shortcuts, this setting persists between game sessions. Once you set it, the game remembers your preference.
Steps:
- Open the game’s Settings or Options menu
- Navigate to Video, Graphics, or Display settings
- Find the Display Mode or Screen Mode dropdown
- Select Fullscreen or Borderless Windowed
- Click Apply or Save, then confirm the change
Why This Works: The game engine reads this setting from its configuration on every launch and initializes the display in the requested mode.
Fix 3: Set the Correct Monitor Resolution
Skill Level: Beginner
Overview: If your game’s resolution does not match your monitor’s native resolution, fullscreen mode may fail or display with black bars.
What Is This About?
Fullscreen mode requires the game resolution to match or be supported by the monitor. A mismatch causes the game to fall back to windowed mode or display incorrectly.
Why It Stands Out
This is one of the most common causes of fullscreen issues that gamers overlook. The fix takes 30 seconds.
Steps:
- Right-click your desktop and select Display Settings
- Note your monitor’s recommended resolution (e.g., 1920×1080)
- Open your game’s Video settings
- Set the resolution to match your monitor’s native resolution
- Apply the change and set Display Mode to Fullscreen
Why This Works: When the game resolution matches the monitor, the GPU can output a direct fullscreen signal without scaling or letterboxing.
Related: Where Is Rainbow Six Siege Installed has more display optimization tips.
Fix 4: Disable Fullscreen Optimizations in Windows
Skill Level: Intermediate
Overview: Windows 10 and 11 apply Fullscreen Optimizations by default, which can interfere with exclusive fullscreen in older games.
What Is This About?
Fullscreen Optimizations is a Windows feature that runs fullscreen games in a borderless window internally. This can cause input lag, stuttering, or prevent true exclusive fullscreen.
Why It Stands Out
Disabling this feature restores true exclusive fullscreen, which can reduce input lag by 5-15ms in competitive games.
Steps:
- Navigate to the game’s .exe file (usually in Steam\steamapps\common\[Game])
- Right-click the .exe and select Properties
- Go to the Compatibility tab
- Check Disable fullscreen optimizations
- Click Apply, then OK
- Restart the game and set it to Fullscreen mode
Why This Works: This tells Windows to stop intercepting the game’s fullscreen requests and lets the game handle display mode directly.
Fix 5: Edit the Game Config File
Skill Level: Intermediate
Overview: Many games store display settings in a configuration file that you can edit manually to force fullscreen mode.
What Is This About?
Games using Unreal Engine, Unity, and other engines often store display preferences in .ini or .cfg files. Editing these directly can force fullscreen when in-game settings fail.
Why It Stands Out
This method works even when the game’s menu is inaccessible or the settings do not save properly.
Steps:
- Find the game’s config file (common locations: Documents\[Game], AppData\Local\[Game], or the game folder)
- Look for files like settings.ini, config.ini, game.cfg, or GameUserSettings.ini
- Open the file in Notepad
- Find lines like FullscreenMode, ScreenMode, or Windowed
- Set FullscreenMode=1 (or 0 for exclusive fullscreen in Unreal Engine games)
- Set ResolutionSizeX and ResolutionSizeY to your monitor resolution
- Save the file and set it to Read-Only to prevent the game from overwriting it
Why This Works: The game reads these values on launch. Setting them manually bypasses any in-game menu bugs.
Related: What Is Ads In Call Of Duty And Why Is I… covers more advanced troubleshooting.
Fix 6: Update or Reinstall GPU Drivers
Skill Level: Beginner
Overview: Outdated or corrupted GPU drivers are a common cause of fullscreen issues. Updating to the latest driver often resolves display mode problems.
What Is This About?
GPU drivers handle the communication between games and your display. When drivers are outdated, they may not properly support the display modes a game requests.
Why It Stands Out
A clean driver update fixes not just fullscreen issues but also improves performance and stability across all games.
Steps:
- Identify your GPU: Press Win+R, type dxdiag, go to Display tab
- Download the latest driver from nvidia.com, amd.com, or intel.com
- Use DDU (Display Driver Uninstaller) in Safe Mode for a clean removal
- Install the fresh driver and restart your PC
- Launch your game and set it to Fullscreen mode
Why This Works: Fresh drivers ensure the GPU properly handles fullscreen swap chain requests from games.
Fix 7: Use Borderless Windowed as an Alternative
Skill Level: Beginner
Overview: If exclusive fullscreen refuses to work, Borderless Windowed mode gives you the same visual experience with better compatibility.
What Is This About?
Borderless Windowed renders the game at your desktop resolution without window borders. It looks identical to fullscreen but runs as a window internally.
Why It Stands Out
This mode works in virtually every game and eliminates alt-tab delays. For most gamers, this is the best option.
Steps:
- Open the game’s Video or Display settings
- Find the Display Mode option
- Select Borderless Windowed or Borderless
- Ensure the resolution matches your desktop resolution
- Apply and confirm the change
Why This Works: The game renders to a window that exactly matches your monitor resolution and position, creating a seamless fullscreen appearance without exclusive mode.
Related: What Does F4 Mean The Complete Guide To … explains more about display optimization.
Common Misconceptions
Myth 1: Fullscreen always gives better performance than borderless.
Reality: On Windows 10 and 11, the performance difference is often 1-3 FPS. Borderless windowed with hardware-accelerated GPU scheduling performs nearly identically to exclusive fullscreen in most games.
Myth 2: Alt+Enter works in every game.
Reality: Some games, especially those using custom engines or launchers (like some Ubisoft and EA titles), do not support Alt+Enter. You must use the in-game settings menu instead.
Myth 3: Fullscreen issues are always the game’s fault.
Reality: Most fullscreen problems are caused by Windows settings, GPU driver issues, or resolution mismatches — not the game itself.
Myth 4: You need to restart your PC after changing display mode.
Reality: A game restart is sufficient. Only driver updates require a full system restart.
Deep Dive: Advanced Fullscreen Tips
| Tip | Skill Level | Time | Success Rate |
|---|---|---|---|
| Use GPU control panel to force fullscreen for specific games | Advanced | 5 min | 90% |
| Disable Windows Game Bar (Win+G) which can interfere with fullscreen | Beginner | 1 min | 70% |
| Set the game’s .exe to run as Administrator for display priority | Intermediate | 2 min | 60% |
| Use a third-party tool like Borderless Gaming for stubborn games | Intermediate | 10 min | 85% |
| Disable DPI scaling on the game .exe for correct fullscreen sizing | Intermediate | 3 min | 75% |
| Create a custom resolution in GPU control panel for unusual monitors | Advanced | 10 min | 80% |
Quick Pick Guide
| If You Want… | Best Choice |
|---|---|
| Best competitive performance | Exclusive Fullscreen |
| Fast alt-tabbing while gaming | Borderless Windowed |
| Streaming or recording gameplay | Borderless Windowed |
| Fixing an old game that won’t fullscreen | Config file edit + Compatibility mode |
| Lowest input lag possible | Exclusive Fullscreen + V-Sync off |
| Playing on a multi-monitor setup | Borderless Windowed |
| Fixing black bars in fullscreen | Set native monitor resolution |
| Quick fix that works in most games | Alt+Enter |
FAQ
Q: Why does my game go black when I switch to fullscreen?
A: This usually means the game is trying to use a resolution or refresh rate your monitor does not support. Boot the game in windowed mode, set the resolution to match your monitor, then switch to fullscreen.
Q: Is borderless windowed bad for performance?
A: The performance difference is minimal on modern systems — typically 1-3 FPS. For competitive esports, use exclusive fullscreen. For everything else, borderless is fine.
Q: How do I force fullscreen in a game that only has windowed mode?
A: Edit the game’s config file to set FullscreenMode=1, or use a third-party tool like Borderless Gaming to force borderless windowed mode.
Final Thoughts
Getting fullscreen mode working properly is one of the most impactful tweaks you can make to your PC gaming experience. Start with the simple Alt+Enter shortcut, then work through the in-game settings, and finally try config file edits if needed. For most modern games, Borderless Windowed is the best all-around choice — it looks like fullscreen, alt-tabs instantly, and the performance difference is negligible. If you are playing competitive shooters where every millisecond counts, exclusive fullscreen with V-Sync disabled will give you the lowest input lag.
Sources & Verification
- Microsoft Windows Display Documentation — Official Windows display mode documentation
- NVIDIA Gaming Guides — GPU driver and display optimization guides
- PCGamingWiki — Community database of game-specific display fixes
What Do You Think?
Did these fixes solve your fullscreen issues? Let us know in the comments below which method worked for your game. If you have a game that refuses to go fullscreen, drop the name and we will help you find a solution.
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