Google is testing a new design for the "claim this knowledge panel" link under a knowledge panel that is eligible for verification. Before it was just a line of text, now it is a prettier and fancier button.
Here is a screen shot from Sergey Alakov on Twitter:
This is not a huge deal at all, but maybe it will draw more attention and thus lead to more verification claims by the owners or managers of the knowledge panels?
Forum discussion at Twitter.
