Metadata: view in new pane (also, displaying in Rem)

Would be good to be able to SHIFT+CLICK/ENTER to view metadata on the second pane.

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I’d also like to be able to view selected Rem metadata in some way, perhaps inline with the text itself.
Something like:

  • This is my Rem text. (45 child Rem, 456 characters, 120 words, created 2021/02/21, modified 2021/02/21)

Of course, we’d need to be able to enable these individually as needed (ideally, be able to style them individually as well).