Quick access (Show at cursor position)
As of Ver 3.6, quick access feature is introduced to Microsoft Store version. A user can access the brightness slider for the monitor where the cursor currently is located from anywhere on the desktop (as long as that monitor is controllable by this app).
This feature can be invoked by a hot key Show at cursor position or from the context menu of desktop.
https://user-images.githubusercontent.com/7205690/135702510-c0dadf93-7501-472b-9bb2-59dc885f3ba8.mp4
This menu item can be added to or removed from the context menu of desktop by Add to context menu in the hidden menu. Please note it requires UAC authorization to access the registry.

To open the hidden menu, please refer to probe.
In case multiple monitors are connected and the user choose to "duplicate these displays", this function will show one of these monitors in turn.