Filter by unread

I often find myself wishing for an “Unread” (not in completed) filter option for my bookshelf. See screenshot for where I mean. I imagine it can be done with a smart shelf, but I would prefer a simpler option for a basic filter like this. I’ve got a lot of books, and only new books I have acquired since getting BookFusion have go through the process of adding them to Plan to Read. And even then I don’t add them all there since I tend to grab a lot of free books I don’t have an immediate interest in. Thanks!