This is not natively supported. Conceivably an admin could embed an iframe for you in a post, if we felt it was safe to do so.
"Conceivably an admin could embed an iframe"
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I've never had much luck "ordering off-menu". Thanks for the response all the same.
I have an image of a diagram that I'd like to add hover-over or clickable hot spots that would pop up a window or take the reader to a footnote. Is this possible with the native functionality of the LW Site?