@bobchops - This is not currently possible using out-of-the-box Miro functionality. However, it may be possible using a combination of your own application and the Miro Developer Platform API.
You would probably want someone with a development background to review the developer platform documentation.
If this is a feature that you’d like see available, I’d suggest creating an Idea in the Wish List category by following the guidelines here: Wish List: Everything You Need to Know.
If you do create a Wish List Idea post, I would also recommend that you post a link to it back here, so that future readers of this post can quickly get to and vote for your Idea.
Lastly, don't forget to vote for your own Idea!