export info from roam to make an unfurl and a page redirect. alpha version
Roam does not (yet) provide previews for unfurl. this extension attempts to provide that functionality, at least in part. This is an alpha version. use at your peril.
Pin the extension (using extension management) and when in a Roam page, click on the icon and then click on "create link". copy link from pop-up and close the popup (or it may interfere with Roam tabs). depending on your settings, the link may be automatically copied into your clipboard.
screen shot is not very useful, as all you have is an icon to click on.