Screen brightness can make a noticeable difference when you’re using your Windows PC for long periods. A display that’s too bright can feel uncomfortable, especially at night, while a screen that’s too dim can make text, images, and videos difficult to see. Adjusting the brightness can also help reduce power consumption and extend battery life on a laptop.
Windows 11 and Windows 10 provide several easy ways to change display brightness. You can use Quick Settings, the Settings app, keyboard brightness keys, or Windows Mobility Center. Some laptops can even automatically adjust their brightness depending on lighting conditions or battery status.
However, the brightness slider may occasionally disappear or stop working because of a display driver, monitor, or Windows configuration issue.
In this guide, I’ll show you how to adjust display brightness settings on Windows 11 and Windows 10, including the quickest methods and what to do if you can’t find the brightness controls.
1. Adjust Brightness Using Quick Settings
The fastest way to change your screen brightness in Windows 11 is through the Quick Settings panel.
On Windows 11
- Click the network, volume, or battery area on the right side of the taskbar. You can also press Windows + A to open Quick Settings.
- Look for the Brightness slider, usually identified by a sun icon.
- Drag the slider to the right to increase brightness or to the left to decrease it.
The change happens immediately, so you can move the slider until the display reaches a comfortable brightness level.
On Windows 10
Windows 10 provides similar controls through Action Center.
- Press Windows + A or click the Action Center icon on the taskbar.
- Find the brightness slider near the bottom of Action Center.
- Move it left or right to decrease or increase the display brightness.
If you don’t see a brightness slider, Windows may not have direct brightness control over your display. This commonly happens when using an external monitor.
2. Change Display Brightness Through Windows Settings
The Settings app is another simple way to control brightness and provides access to additional display options.
Windows 11
- Press Windows + I to open Settings.
- Select System from the left sidebar.
- Click Display.
- Under Brightness & color, locate the Brightness slider.
- Drag the slider left to make your display darker or right to make it brighter.
You may also find additional brightness-related options here if they’re supported by your laptop or display.
Windows 10
- Press Windows + I to open Settings.
- Go to System > Display.
- Find Change brightness for the built-in display under the Brightness and color section.
- Move the slider to your preferred brightness level.
Windows remembers the setting, although some laptops may automatically modify brightness when switching between battery and AC power.
3. Adjust Brightness Using Your Keyboard
Most Windows laptops include dedicated keyboard shortcuts for controlling screen brightness.
Look at the function keys along the top row of your keyboard. You’ll usually find two keys displaying sun-shaped brightness icons.
Depending on the laptop manufacturer, you may need to press:
Fn + Brightness Up key
or
Fn + Brightness Down key
On some laptops, pressing the brightness key alone is enough.
For example, the controls may appear on F1/F2, F5/F6, or other function keys depending on the manufacturer and laptop model.
If the brightness keys suddenly stop working, try restarting your computer. You may also need to install or update the manufacturer’s keyboard/hotkey software or display-related drivers.
4. Adjust Brightness Using Windows Mobility Center
Windows Mobility Center provides another convenient brightness control on many laptops.
- Press Windows + R to open Run.
- Type:
mblctr
- Press Enter.
Alternatively, right-click the Start button and look for Mobility Center if it is available on your system.
- Find the Display brightness section.
- Move the brightness slider left or right.
Windows Mobility Center is mainly designed for laptops, so this option may not be available or useful on every desktop PC.
5. Change Brightness Using the Battery Icon in Windows 10
Some older versions and configurations of Windows 10 provide brightness controls through the battery or Action Center interface.
Click the battery icon in the notification area and check whether a brightness control is available.
If it isn’t, press Windows + A and use the brightness slider in Action Center instead.
The exact interface can vary depending on the Windows 10 version installed on your PC.
6. Adjust Brightness on an External Monitor
If you’re using a desktop PC or have connected an external monitor to your laptop, you may notice that the Windows brightness slider is missing.
This isn’t necessarily a problem with Windows.
Many external monitors require you to adjust brightness using their physical monitor controls or on-screen display (OSD).
- Locate the buttons or joystick on the side, back, or bottom of your monitor.
- Press the Menu button or joystick.
- Open Picture, Display, or a similarly named section.
- Find Brightness.
- Increase or decrease the value as required.
Some monitors also support software-based brightness adjustment through manufacturer utilities, but availability depends on the monitor model.
7. Enable Automatic or Content-Based Brightness Adjustment
Certain laptops and tablets include sensors or display technologies that allow Windows to adjust brightness automatically.
On Windows 11:
- Open Settings.
- Go to System > Display.
- Expand the Brightness section if additional options are available.
- Look for automatic brightness or brightness optimization options.
Depending on your hardware and Windows version, you may see settings related to automatically changing brightness when lighting changes or optimizing brightness based on displayed content.
If you prefer consistent brightness, you can disable these options.
Not every computer supports automatic brightness, so don’t worry if these settings don’t appear.
8. Use Battery Saver to Reduce Brightness
Reducing screen brightness is one of the easiest ways to lower power consumption on a laptop.
Windows can also manage power-saving display behavior when battery-saving features are enabled.
On Windows 11, open:
Settings > System > Power & battery
Look for Energy saver or related power-saving options.
On Windows 10, open:
Settings > System > Battery
Depending on your Windows version and device, battery-saving settings may reduce screen brightness or otherwise optimize display power consumption.
You can still manually adjust brightness afterward if the display becomes too dark.
Brightness Slider Missing in Windows 11/10? Try These Fixes
If you’re using a laptop’s built-in display but can’t find the brightness slider, there may be a problem with your graphics or monitor driver.
Start by restarting your PC. If that doesn’t help, try updating your display driver.
- Right-click Start and select Device Manager.
- Expand Display adapters.
- Right-click your graphics adapter and select Update driver.
- Select Search automatically for drivers.
You should also expand Monitors in Device Manager and make sure your display isn’t disabled.
If the problem started after a graphics driver update, reinstalling the appropriate Intel, AMD, NVIDIA, or laptop-manufacturer graphics driver may resolve it.
Remember that a missing Windows brightness slider can be completely normal when you’re using an external desktop monitor.
What Brightness Level Should You Use?
There isn’t one brightness percentage that’s best for everyone. The appropriate level depends on your room lighting, display, and personal comfort.
In a brightly lit room, you may need higher brightness to see the screen clearly. In a dark room, reducing brightness can make the display more comfortable.
A good approach is to adjust the screen so that it doesn’t appear dramatically brighter or darker than your surroundings.
You can also enable Night light from:
Settings > System > Display > Night light
Night light changes the display’s color temperature rather than simply reducing brightness, which can make the screen appear warmer at night.
FAQs
Why can’t I change the brightness on Windows 11?
If you’re using a laptop and the brightness slider is missing or doesn’t work, the issue may be related to the graphics driver, monitor driver, or device-specific software. Update your display drivers and restart the computer. If you’re using an external monitor, you may need to use the monitor’s physical controls instead.
What is the keyboard shortcut for brightness in Windows 11?
There isn’t a single universal brightness shortcut for every Windows computer. Most laptops have dedicated brightness function keys marked with sun icons. Depending on the device, you may need to hold the Fn key while pressing them.
Why does my Windows screen brightness keep changing automatically?
Your device may have automatic brightness, content-adaptive brightness, or power-saving display features enabled. Check Settings > System > Display > Brightness and your power or battery settings for available automatic adjustment options.
Can I change the brightness of an external monitor from Windows?
Windows doesn’t provide native brightness control for every external monitor. In many cases, you’ll need to use the buttons or joystick built into the monitor. Some compatible displays can also be controlled through manufacturer software or supported monitor-control applications.
Does lowering screen brightness save battery?
Yes. The display consumes a significant amount of power on many laptops, so lowering its brightness can help reduce power usage and potentially extend battery runtime.
Conclusion
Adjusting display brightness on Windows 11 and Windows 10 is straightforward once you know where the controls are located. For most laptop users, Quick Settings or the keyboard brightness keys are the fastest options, while the Settings app provides access to additional display and automatic brightness features.
If you’re using an external monitor, you’ll often need to adjust brightness using the monitor’s own controls. And if the brightness slider unexpectedly disappears on a laptop, checking your display and graphics drivers is a good place to start.
Ultimately, the best brightness level is the one that keeps your screen clearly visible without making it unnecessarily bright. Adjusting it based on your surroundings can improve viewing comfort while also helping conserve battery power on portable Windows devices.