Twinkle Tray Brightness Slider
The slider panel is the whole point of Twinkle Tray. Instead of a full application window, you get a small flyout next to the clock with one slider per screen.
The panel itself
Clicking the tray icon opens a compact panel styled to sit alongside the Windows volume and network flyouts. Each detected display gets its own row: a name, a slider and the current level. Changes apply as you drag, so you can judge the result immediately.
Per-monitor rather than global
Because every display keeps its own level, you can dim the screen facing a window and leave the other alone. That is the behaviour most multi-monitor users want; see multiple monitor brightness control for how to match levels sensibly.
Keyboard shortcuts
Desktop keyboards have no brightness keys, which is why shortcut support matters. Assign key combinations to step brightness up and down and you get laptop-style control on a tower PC. Our guide to using a brightness slider on Windows shows the workflow.
Mixed setups
Internal laptop panels and external monitors use different control paths, but they appear in the same panel. Whether an external display responds depends on its DDC/CI support and connection.
Other tray sliders worth knowing
Once you get used to adjusting brightness from the notification area, the same habit tends to spread to other settings you change many times a day. Audio is the obvious one: the built-in Windows volume flyout controls the default output device, so switching outputs or quieting a single noisy app still means opening Settings or the legacy volume mixer.
If that describes your setup, a dedicated volume utility complements a brightness slider nicely. EarTrumpet replaces the standard flyout with a panel that lists each running application with its own slider, and lets you move an app to a different output device without leaving the tray. Between the two panels, brightness and per-app audio both stay one click from the clock instead of buried in Settings.
Frequently Asked Questions
Can I hide displays I never adjust?
Utilities of this kind generally let you reorder or hide monitors so the panel stays short. Check the app's settings for the current options.
Does the slider remember levels after a restart?
The monitor stores its own brightness value, so it usually persists. Some monitors reset on power loss or when switching inputs.
Is there a slider for contrast too?
Brightness is the reliable control across monitors. Other DDC/CI values exist but are inconsistently implemented, so tools expose them cautiously if at all.