Author here. In this case, I wanted to share to Twitter. That would have resulted in the page title and URL being shared - so copy url wasn't a suitable. But t

Author here. In this case, I wanted to share to Twitter. That would have resulted in the page title and URL being shared - so copy url wasn't a suitable. But the actual destination is irrelevant. How was I (or any user unfamiliar with the interface) supposed to intuit that the panel was horizontally scrollable.