Key Squares?

Where is the "Key Squares" button?

Are you using the browser version or the app?

I'm using Chrome a Windows 10 laptop.

 I am using Firefox 49.0.1 on MacOS 10.11.6, and, even though the instructions refer to it, I don't see it either:

Key squares evidently didn't make the transition to V3. Use V2 to see them.

I found the "Old Chess.com" button near the top.  That goes to V2, right?

That works!

Thanks!

--Gil

You can't. That's a long-since discontinued feature of the old Lessons system, and the text in the older Lessons still refers to it here and there. "Key Squares" hasn't been available on the web for quite a while, and I don't think the apps ever had it... The new Lessons feature and content doesn't have this issue.