Hello,

Here's how that function works:
* Window is minimized (e.g. Notepad)
* You drag a file from File Explorer and hold it over the taskbar button for the minimized window
* The minimized window gets focus so you can drop the file on it

For monitor fading per window, we do have this open as a feature request. I've added your vote to it, and if we have any information on it in the future, we'll be sure to let you know.

Thanks!