How do I change or remove the Follow button in my header?

The Follow link or button in your header opens your Join pop-up, where visitors sign up. For a signed-in member it reads Member and opens their members page. Every new website starts with one.

It is an ordinary entry in your header, of the Member Popup type, so you change it where you change the rest of the menu. Open your website in Website Builder, then Menu Layouts and Header. On the Links tab, look for Follow in the menu list, or under Buttons further down. Type a new Display Label to rename it, such as Join or Mailing List, drag it to move it, or press the X on its row to remove it. Then save.

To add one back, add a link or a button there and set its Type to Member Popup.