Twinkle Tray lets you easily manage the brightness levels on one or multiple monitors. Normalize backlight across different model monitors. Seamlessly blends in with Windows 10 & Windows 11. Uses your Personalization settings to match your taskbar. Starts up with Windows. Accessible from the system tray. Automatically change monitor brightness depending on the time of day or when idle. Available in multiple languages. (Such as Japanese, Spanish, Russian, French, Norwegian, German, Italian, Chinese, Vietnamese, and Croatian) Control DDC/CI features such as contrast, volume, and power state. Works with most laptops and DDC/CI-enabled monitors.

Highlights since in v1.15.5: - Rewrote DDC/CI code to (hopefully) improve hardware compatibility. If you encounter issues with monitors being detected after this update, try enabling "Legacy DDC/CI detection method" in the "Troubleshooting" settings. - Implemented additional customizations to DDC/CI features (contrast, volume, and custom). You can now set min/max values, and link the feature to the brightness slider. As an example, you could link contrast with brightness, so you can reach lower perceived brightness levels on your monitor than with brightness adjustments alone. - Twinkle Tray will now attempt to read supported VCP codes, which are displayed in the "DDC/CI Features" tab. - Overhauled the hotkeys system. You can now assign multiple monitors per hotkey, set/adjust brightness to any value, and send arbitrary VCP codes (contrast, volume, power state, etc). Multiple actions can be assigned to hotkeys. - Added support for Apple Studio Displays (thanks @jridgewell). These displays may not be compatible with all Twinkle Tray features. - Implemented an option to block idle detection while a fullscreen app is focused. - Fixed scheduled brightness changes ("Time of Day Adjustments") activating at the wrong time, or not at all. - Redesigned the settings window to better match Windows 11 and account for the new v1.16.0 features. See full changelog for v1.16.0-v1.16.3 at twinkletray.com.