How to Make Undertale Full Screen?

Make Undertale Full Screen

Make undertale full screen is a fun game to play since you have to hunt down and defeat every monster in the underground. It also has excellent background music and a witty sense of humour. Many players appear to be having problems with Undertale. When they play the game, it will be in windowed mode and not take up the entire screen.

There is a simple remedy for this glitch, and depending on your computer, one of the solutions below should allow you to play Undertale in full screen mode. These keyboard shortcuts will work no matter where you got your game, whether on Steam, the Humble Bundle, or somewhere else! These instructions should force the game to go full screen even if the full screen button on the window is greyed out or missing.

If you’ve downloaded Undertale from Steam on your Windows PC, Mac, or laptop, you’re probably wondering how you’re going to make it large. Nothing is more aggravating than wanting to play your game fullscreen but not being able to think out how to make Undertale full screen or maximise its display size on your system.

Fortunately, there are various options for making it full screen:

To play Undertale in full-screen mode on Windows, follow these steps:

Undertale in full screen mode

Method 1:

Press F4, the fastest and simplest way to maximise and get the game window full screen.

Method 2:

Hold FN + F4 key at the same time. In some circumstances, using the F4 key alone does not do the intended function; for example, some HP laptop users claimed that pressing F4 does not display full screen; instead, a menu appears on the system asking if you want to “project.” Then you should present this method a shot.

The Fn key, whose full name is “function,” is a modifier key in computing that, when pushed jointly, temporarily changes the typical operation of another key. It is usually found on the left-bottom side of the keyboard.

Method 3:

Press Alt + Enter at the same time. This is another command in Undertale that allows you to switch to full screen, and you can so switch between full screen and windowed mode for Undertale and other RPGs.

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To make Undertale full screen on Windows 10, follow these steps:

  • When you click F4 in Windows 10, unlike prior versions of Windows, your game will not become full screen.
  • Instead, it takes you to the Project screen.
  • To get Undertale full screen on Windows 10, press ALT+Enter simultaneously, and the game will take over the entire screen.
  • After clicking F4 on Windows 10, the Project screen appears.
  • Undertale is a decent video game about a child who falls into a monster-infested underworld.
  • Dodging magical bullet strikes, fighting, or acting your way through conflicts are all better options.
  • Every monster has its attacks and personalities, and they’re all trying to stop you.
  • If you desire, you can exhibit MERCY.

You might even meet some new people. But what if you happen to run into a serial killer? Many gamers appear to be having trouble with Undertale full screen. When they run the game, it will be locked in windowed mode and not use the entire screen.

Simple Solution:

Depending on the kind of system you’re using, there’s a simple repair. Here’s one of the ways to get Undertale to run in full screen mode! Regardless of where you purchased the game, whether through Humble Bundle, Steam, or the keyboard shortcuts! These commands force the game to go full screen if the full screen button on the window is grey or absent.

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To play Undertale on full screen on a Mac, follow these steps.

If you’re playing Undertale on a MacBook Pro or MacBook Air, all you have to do is press the green full-screen button; if you can’t locate it, try F4 or Ctrl+F4, which may also work.


It’s a simple patch that makes understanding how to make Undertale full screen much easier. We’re not sure why this bug breathes, but it’s thankfully no significant pain. Undertale is a fantastic game that every gamer should experience. In a market flooded with reboots and dull sequels and prequels, this critically acclaimed indie RPG built practically by a one-person team is a remarkable example of uniqueness and ingenuity.

When it was published in 2015, it was dubbed “game of the year” for a cause! Now go forth and enjoy this masterpiece in full screen mode, like it was intended.


What is the best effective method to make a game full screen?

Full-Screen Media: If you’re viewing a video or playing a game on your computer and want to access it in full-screen mode rather than a window, press ALT and ENTER at the same time. – When you’re finished with a programme, press ALT+F4 to exit it.

Why isn’t my game taking up the entire screen?

However, by just altering your display settings, you can resolve this issue. To do so:

  • Right-click on your system screen and select Display settings from the drop-down menu.
  • Set the monitor to the same number as the primary display in the Display settings.
  • Try running games in full screen mode after saving the adjustments.

How can I make the entire game screen?

  • My game will not open in full-screen mode on Windows 10
  • Click on the Display Settings, which is present in the context menu when you right-click on your desktop.
  • Make sure your font size is set to 100% in the same window (recommended)
  • Restart the game to see if it now opens in full screen.

On a Mac, how do I use F4?

The F4 key on a Mac is typically used for system functions such as activating the launchpad application or altering the screen brightness. If you wish to utilise F4 to play and pause audio in MAXQDA for Mac, go to “System Preferences > Keyboard” and check the box.

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