Hi chadg5058 -
There's no easy way to do that, apart from noting the lack of green check marks.
You can filter the Media Library in a few different ways - All Media, Videos, Photos, Audio - by selecting from the dropdown menu at the top (under the word Produce).
You can also sort your library by name, date, files size etc - but not by used/unused
In the same menu (the little squares icon), you can remove all unused media, but that doesn't help you at all.
One thing that might help (might!) is to remove all used files from the library, so you're only left with the (so far) unused ones.
Cheers - Tony
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