What is the ⎋ key

Question

I'm new to IntelliJ and I saw a start-up tip that said, "The ⎋ key in any tool window moves the focus to the editor." However, I don't know what the ⎋ key is. I've been programming a long time. Is it possible there's a key on my keyboard that I've missed all these years?

Answer 1

⎋ relates to Escape on Macintosh keyboards. Here is some documentation showing such.