How to increase minecraft window size
Christopher Snyder
Updated on March 22, 2026

Edit .minecraft/options.txt and set the overrideWidth and overrideHeight values to your desired values. This will be the size of the game screen itself (so the actual window will be slightly larger with your OS’s borders).
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Incompatible Java version is one possible reason why you can’t change the size of your screen while playing Minecraft. Here are two methods on how to troubleshoot Java issues: Method 1: Perform a clean boot, t his helps
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Hope this helps!Ratings and feedback is appreciated! :DSTEPS:1.Go to options2.Click on video settings3.Click on GUI Scale button4.Every time you click the bu…
/size Command use /size set 1-infinity counting 1.5 and stuff “@a/@p/@s/@e/username” to change your size, use /size reset “@a/@p/@s/@e/username” to set your size back to normal, use /size add 1-infinity counting 1.5 and stuff “@a/@p/@s/@e/username” to add more size to your current size, use /size remove 1-infinity …
Start the Minecraft Launcher by double-clicking the Minecraft icon on your PC. Select the Launch Options tab. Make sure the Advanced settings is turned on. Select the profile you’d like to edit. Make sure that the JVM arguments are turned on. Step 3. Adjust RAM for Minecraft. Then you should see a line of text like -Xmx1G.
After looking a little deeper into your issue, I have found that the minecraft launcher’s profile options allow you to set the resolution that is used by windowed mode. That option combined with Forge’s ability to resize the window should allow you to play in windowed mode at whatever resolution you want and still have it fill your screen as much as you want it to.
Just put it in your game object’s constructor: // Resize the screen to 1024 x 768. IntPtr ptr = this.Window.Handle; System.Windows.Forms.Form form = …
When you run Sizer the sizing arrows icon appears in the system tray and you can right click and select a size from the predefined list and any custom sizes you have set up, the last active window will then snap to that size. There are a few other ways to resize a window using Sizer.
If the maximum frame limit in options is just not enough, this is the guide will help you learn how to increase the frame limit for your Minecraft world. Hold the Windows button and R at the same time. Wait until a small window pops up.
Related Questions
How do I change the size of a Minecraft screen?
I figured it out. Edit .minecraft/options.txt and set the overrideWidth and overrideHeight values to your desired values. This will be the size of the game screen itself (so the actual window will be slightly larger with your OS’s borders).
How do I increase the resolution of the Minecraft world?
You can’t increase the resolution of the Minecraft world, but you can make sure the interface elements don’t scale upward. As of Minecraft Beta 1.5, you can set the scale of the UI by going into Options → Video settings… and clicking on GUI scale.
How do I resize a window using sizer?
When you run Sizer the sizing arrows icon appears in the system tray and you can right click and select a size from the predefined list and any custom sizes you have set up, the last active window will then snap to that size. There are a few other ways to resize a window using Sizer.
How do I change the scale of the Minecraft UI?
As of Minecraft Beta 1.5, you can set the scale of the UI by going into Options → Video settings… and clicking on GUI scale. If you leave GUI scale set to auto, it’ll continue to use the old GUI scaling: if your window exceeds 1280×720, Minecraft scales the interface elements up with the window.