An Untitled Document
Running into an untitled document does not necessarily mean it has no designation. Some are parts of other documents that have titles but for some unexplained reason have become detached.
The other case is when focus is placed upon the page with no name because it has something to say that is both relevant and applicable to what the person reading it is experiencing at the moment. Then, by naming the untitled document, its contents becomes part of the reader’s internal library, unless it’s a blank page.