What's that small black dot in the upper right?

[pisum]

if you’re ever curious what something is on a particular web page, you can open up your browser’s Developer Tools, go to Elements, click the element selection tool in the top-left corner (the one that looks like a little pointer over a square), and then highlight/click whatever you’re interested in. that will bring up the html code and show some details for that particular element, similar to what sullivanribbit has in his code snippet above.