I'm just beginning, and I want to learn how to clear the terminal window screen. I thought the command was CLS, but this isn't a known command, so the result is zsh: command not found: cls Also, it's not mentioned in the Command Line Primer Surely it's possible to access this, but how?

I have the released version of Xcode 12, and when I use the help, I am taken to Xcode 11 documentation. (for example https://developer.apple.com/tutorials/swiftui) Where can I find Xcode 12 specific documentation? Is it a case of not yet having been published?