As a new Sumatra user, I was so struck by its excellence (for example, the only PDF reader I have found that gets bookmarks right) that I was quick to contribute -- figuring that anything this good should be able to work out little problems easily. Then I found an issue raised by a number of users in a 2015 thread "Display scrollbar in Single Page view" where there seems a strange mental block about a simple concept, seeming to elude easy resolution. That problem remains but the thread is old and closed, so I resurrect it here.

The concept is simple: What does the vertical scrollbar represent? Is it the progress on a page or the progress through the document? It is obviously the latter, in all readers or editors (of PDF or any other document type) that I know, including Sumatra. Yet Sumatra alone seems to make the mistake of saying that the scrollbar is not relevant unless "Show Pages Continuously" (what other readers call "Enable Scrolling") is enabled. It's just weird, and a disservice to a great reader.

Now, it's true that there is always the non-graphical page count for reference regarding position in the document, but that's also true when "Show Pages Continuously" is enabled -- in which case the scrollbar shows position in the document, not position on the page. Position in the document remains a concern regardless how pages are displayed, so why would that graphical representation be removed when "Show Pages Continuously" is disabled?