Win10 Brightness Slider

Laptop users can normally change screen brightness using special keys, but older devices may not have driver support for Windows 10, making these keys useless. Even if they work, however, being able to alter brightness directly from your desktop can be useful in some situations.
Win10 Brightness Slider is a small, open-source application that adds a simple slider in the system tray area, which you can use to change the brightness of all connected monitors.

Small, portable brightness slider

Setting everything up is very simple, partly because you don’t need to install anything beforehand. The program can be launched from any location, and you can even specify whether or not it should be run at startup.
To access the slider, simply click the application’s tray icon. If multiple monitors are detected, a separate slider will be shown for each device. You can also try detecting new devices manually if one of them was connected while the application was running.

Great for laptop and even desktop PC users

There are many reasons why you might prefer to change your monitor’s brightness using a slider, and this utility has the added advantage of letting you control this setting for all your devices from one menu.
If anything, desktop PC users may find this utility to be more helpful than others, as it saves them the trouble of having to use the buttons on the side of their monitors, while also allowing them to manage multiple devices.

Simple utility that adds a tray area brightness slider for your convenience

All in all, Win10 Brightness Slider does exactly what the name suggests, providing you with a basic slider that can help you manage your monitor’s brightness. It is portable, thus very easy to deploy, and it can be accessed by simply clicking the application’s tray icon.