Every gamer has encountered an annoying situation when, after launching their favorite mobile game, the smartphone screen remains with black stripes along the edges or on top. This not only ruins visual immersion, but also reduces the usable viewing area, which is critical in competitive shooters or strategy games. The problem lies in the fact that many old applications or games optimized for the classic 16:9 aspect ratio do not automatically stretch to modern screens with a ratio of 18:9, 19.5:9 or even 20:9.
Fortunately, the operating system Android provides powerful tools to force changes in the behavior of application windows. You can force the game to take up all available pixel space, ignoring standard developer restrictions. In this article, we will look in detail at how to enable full screen mode through system settings, special developer menus, and even third-party utilities.
Don't worry if you don't find the desired item in your menu right away. The interfaces of the shells from Samsung, Xiaomi, Realme and pure Android are significantly different. We will look at universal methods that work on most devices, as well as specific features from popular manufacturers. Ready to expand your gaming experience? Let's go.
System display settings for applications
The safest and most correct way to solve the problem is to use the built-in functions of the operating system. Starting from version Android 9, the system has a menu that allows you to control the behavior of applications that do not support modern screen formats. You don't need superuser rights or complex commands.
Usually this section is hidden in the deep display settings. Look for an option that might be called "Full Screen Apps," "Screen Aspect Ratio," or "Apps with a Cutout." Here the system offers to select a display mode for each installed game separately. This gives you flexibility: you can stretch the shooter to the entire screen, but leave the banking application in standard mode for security.
If your device is running shell MIUI or HyperOS, the path will look like this: go to Settings → Display → Full screen applications. Find the game you want in the list and switch the toggle switch to the active position. On devices Samsung with a shell One UI a similar function is located along the path Settings → Display → Full-screen applications, where you can select the option "Show camera cutout" or "Automatically".
⚠️ Attention: Forced stretching of the interface can lead to controls (shooting buttons, inventory menu) moving beyond the visible area or being blocked by the cutout camera. Always check the location of the buttons after changing the settings.
After activating the mode, the system may require you to restart the application. Don't ignore this requirement, as many game engines cache the screen resolution when first launched. Only after a reboot will the game correctly draw the interface at the new resolution.
Using developer mode for scaling
When standard settings are not enough, hidden features for advanced users come to the rescue. Developer Mode is a powerful tool that allows you to change system settings, including minimum screen width and window behavior. Activating it is simple, but you need to act carefully.
To enable it, go to Settings → About phone and find the item "Build number" (or "MIUI/OS Version"). Click on it quickly 7 times in a row until a notification appears indicating that you have become a developer. After this, a new section “For Developers” will appear in the main settings menu.
Inside this menu we are interested in the “Minimum Width” item. The default value is usually 360, 392 or 411 dp (density-independent pixels). Increasing this value causes the system to think that the screen is physically larger and redraws the interface, making elements smaller but placing more content on the screen. This often automatically removes black bars in games.
- 📱 Remember the original width value before changing, so that you can return everything as it was if the interface crashed.
- 🚀 Change the value in increments of no more than 20-30 units so as not to make the text and buttons unreadable.
- 🔄 After Each time you change the value, you must completely reboot the device to apply the global settings.
There is also an option “Force resize activities”. If you activate it, the system will try to scale any application to fit the screen size, even if the developer has firmly fixed the orientation or resolution. This is the “heavy artillery” that helps in the most advanced cases.
☑️ Safe developer settings
Specific settings for different brands of smartphones
Smartphone manufacturers often add their own add-ons over the standard one Android, which can either help or hinder setting up full-screen mode. Understanding the features of your shell will save you time and nerves when searching for the treasured switches.
Device owners Xiaomi and Redmi should pay attention to the "Zoom in" function in the settings of specific applications. Sometimes the game does not stretch because the power saving mode is enabled or the frame rate is limited. Game Turbo there are also display settings that take precedence over system ones.
Users Samsung may encounter the fact that even when the full screen is turned on, a thin strip remains at the top. This is due to the security policy One UI, which reserves space for the status bar. In such cases, it helps to enable the “Hide the cutout” option in the screen settings, which programmatically darkens the area around the camera, creating the illusion of a monolithic black eyebrow, or, conversely, allowing the use of this area.
On smartphones Honor and Huawei with a shell MagicOS or EMUI there is a separate menu “Full Screen Mode”, where you can select the type of display of the cutout: “Default”, “Hide the cutout” or “Show the cutout”. Selecting the "Show cutout" mode is often the key to running older games in full screen, since the application has access to the entire matrix.
| Brand / Skin | Path to settings | Key option | Risk of distortion |
|---|---|---|---|
| Xiaomi (MIUI/HyperOS) | Settings → Screen | Full screen applications | Low |
| Samsung (One UI) | Settings → Screen | Show camera cutout | Medium |
| Realme (Realme UI) | Settings → Convenience | Display in cutout | Low |
| Pixel (Stock Android) | Settings → Screen | Allow full screen | Minimal |
If you do not find an exact match with the menu names in the table, use the search in the phone settings. Enter the words “screen”, “cutout” or “full”, and the system itself will suggest the desired section. Search algorithms in modern shells work smart enough to find hidden items.
Problems with the camera cutout and status bar
One of the most common reasons why the game does not become truly full screen is the presence of a cutout for the front camera ("bangs", "hole", "drop"). Game developers often do not take these areas into account, considering them systemic, and place an important interface exactly where it is blocked by the camera or speaker.
In such situations, a dilemma arises: either you get the full screen, but do not see the "Fire" button, or you see the button, but lose 5-10% of the screen area due to the black bar. Modern processors and display drivers allow you to programmatically hide the notch, turning the top of the screen into a black status bar, or, conversely, display an image on top of it.
Try to find the “Hide the notch” or “Bypass the notch” setting. In hidden mode, the system software turns off the pixels around the camera, making the top panel completely black. This visually removes the “hole”, but reduces the usable height of the screen. For some older games, this is the only way to remove aspect ratio distortion.
⚠️ Attention: On some models with curved screen edges (2.5D or 3D glass), turning on the full screen may result in part of the image being “wrapped” onto the side edges, becoming invisible or distorted. Check critical interface elements.
It is also worth mentioning the status bar - a strip at the top with a clock and battery icons. In Full Screen mode settings there is often an option to "Hide status indicators". If you turn it on, the game will take up the entire area, but you will not see the time or charge level. This is convenient for long gaming sessions, but takes some getting used to.
What to do if the cutout overlaps the crosshair?
If the camera is located exactly in the center at the top and overlaps the aiming reticle in a shooter, try changing the interface scale (UI Scale) in the game settings. If there is no such option, the only way out is to enable the black bar (hiding the cutout) in the phone settings to move the playing field lower.
Third-party applications for controlling the screen
If system methods have been exhausted, and the game still stubbornly launches in a small window with thick frames, you can resort to the help of third-party software. There are many utilities on Google Play designed to force changes in display parameters.
One of the popular solutions is the application SecondScreen or various “Resolution Changers”. These apps require special permissions to be granted through the computer using ADB (Android Debug Bridge) or obtaining root access. They allow you to emulate a different screen resolution or pixel density (DPI) only to run specific applications.
Another class of apps are launchers or overlays, which create a virtual frame around the application. It sounds paradoxical, but sometimes adding a black frame programmatically makes the game think that it is running on a device with a different aspect ratio, and it correctly scales the content within this frame.
Using such software carries certain risks. Firstly, there is a load on the system, which can cause a drop in FPS (frames per second). Secondly, some anti-cheat systems in online games may consider interference in the rendering process as an attempt to cheat and block the account. Use such methods only for offline games.
Before installing third-party applications to change the resolution, make a complete backup of your important data. Incorrect DPI settings can make the system interface completely unreadable, and you can reset it only through Hard Reset.
Optimizing games through Game Turbo and game modes
Modern smartphones almost always have a built-in “Game Mode” or “Game Center” (Game Turbo, Game Space, Game Launcher). These add-ons not only save battery, but also control how games interact with the display and notification system.
Go to the game center application, add your problematic game there and go to its individual settings. Often there is a toggle for “Lock Brightness,” “Disable Gestures,” or “Full Immersion.” Enabling these features prevents the system from showing the navigation bar or status bar on top of the game, thereby freeing up every pixel of the screen for gameplay.
In addition, these menus often allow you to adjust touch sensitivity and screen responsiveness. While this doesn't directly affect picture size, complex optimizations in Game Mode often automatically adjust resolution settings to match your phone's native display format.
Some advanced Game Modes allow you to create macros or profiles. You can create a Full Screen profile that disables all system overlays and assign it to older emulators or ports. This is especially true for owners of gaming smartphones like ASUS ROG Phone or Xiaomi Black Shark.
Game modes from the manufacturer are the safest way to achieve full-screen mode, since they work at the driver level and do not require superuser rights.
Frequently asked questions (FAQ)
Why Does the game crash after turning on full screen mode?
This happens because the game engine does not support non-standard resolution or aspect ratio. When attempting to draw an interface outside of the safe zone, a memory error or logic failure occurs. Try reducing the "Minimum width" value in the developer settings or update the game to the latest version.
Does full-screen mode affect the speed of battery drain?
The display mode itself does not affect power consumption. However, if screen stretching forces the processor to render more pixels (for example, at the native resolution of the matrix, rather than at a reduced 16:9), the load on the GPU may increase slightly, resulting in faster drain.
Is it possible to make full screen for console emulators?
Yes, for emulators (Dolphin, PPSSPP, Drastic) screen settings are usually located inside the application itself in the “Video” or “Display” section. There you need to select the "Stretch to screen" option or disable saving aspect ratios. The system settings of the phone are secondary here.
The battery icon disappeared after turning on the full screen, is this normal?
Yes, this is the standard behavior of the “Full Immersion” or “Hide Status Bar” mode. System notification icons are intentionally hidden so as not to distract the player. To see them, you usually just need to swipe down from the top edge of the screen.
How to return all the settings back if the screen has become unreadable?
If you changed the DPI through the developer mode and the interface became too small or disappeared, try blindly going into Settings → For developers and clicking the "Reset settings" button at the top of the screen. If this is not possible, only a complete reset of the device to factory settings (Hard Reset) will help.