Thank you Dwayne for your answer but it’s not that. These topics are mostly about the installed fonts either in Windows/Mac system or in Adobe’s or inDesign’s Fonts folder or the “Document fonts” subfolder of the document’s location.
I don’t know how to insert an image here so I can’t show you it now but when you select Find/Change from the main menu, then click on the upper magnifying glass then you get to the Find attributes (or what) palette, where you can select the font family you would like to find. It’s not what I’m talking about yet but right below this there is a Font style dropdown menü. That’s it.
Now: in that menu there is a swarm of unknown font styles, at least unknown for me. Font style “E” or “M” for example, or “Banner Italic”. “Arial Bold” is a font we all know. “Arial M” or any other font family with font style “M”… well…
These exotic font styles make this list unusably long, that’s why I’d like to shorten it somehow.