Can't remember what this command was

[Gsterman]

So I was messing with client scripting and some guy told me something that would make a new line in the chat that would be visible only to you.
I think it was os.NewLine but I can't be sure. Does anyone recognize this command

[Ad Bot]

[Subpixel]

NewChatSO.addLine("stuff");

[Gsterman]

NewChatSO.addLine("stuff");

Thank you! Locking