Concert pitch
Actually, this is a thank you to Kaditz1. Even though Concert pitch wasn’t on the toolbar line, I scrolled down and found that if I went into view there’s a toolbars section, where I realised that concert pitch could be added. So, thank you for that. We live and learn
Comments
To be clear, the concert pitch is always present by default, unless you previously did essentially the same thing to remove it. So you must have learned t once before as well :-)