Dragging files onto an app icon opens them with that specific application. Reveals the application in the Finder. Why users use it:
SwitchGlass is a dedicated application switcher for macOS designed by developer John Siracusa . It adds a floating window to your Mac that displays an icon for every running app, serving as a highly customizable alternative or supplement to the standard macOS Dock. Key Features in Version 1.4.6 SwitchGlass 1.4.6
: Unlike the macOS Dock, which is often on the "wrong" display, SwitchGlass can be present on all monitors simultaneously. Dragging files onto an app icon opens them
: A new option allows the app switcher to be hidden specifically when it conflicts with the position of the macOS Dock. Visual & UI Refinements : SwitchGlass 1.4.6