When you open files that have a particular file extension, Windows will look at its configuration to determine what the default program should be in order to work with these files. The default ...

However, you can keep the Notepad window on top of any other window by using a utility such as Actual Windows Manager, DeskPins or Always On Top. Download and install Actual Windows Manager.

Despite its slim profile and Windows 3.1-style interface, Notepad is a tool that Windows users have come to know and love, using it for all manner of tweaking, quick editing, and other tasks.