Microsoft uses file associations to set default programs for opening different file types on all its operating systems. As a result, when you open a file, be it text, image, or document, on your ...
Select multiple files, right click on one of them and select Open. Or hit enter. It just depends on the registry entries for the file type whether they can be 'opened' more than one at a time. Oh, and ...
I have used Windows File Explorer for several years, and over that time, I have not always liked the tool. In fact, I often find myself installing extra free tools just to make File Explorer better.