How do I edit the Sign up button?

Hello @AnneR487 ,

See this article for step-by-step and visual guidance on customizing your buttons' formats, including text size, deletion, overall size, etc.

If this is regarding customization for the subscribe button on a sign-up form, then I assume this is in reference to a Sign-Up Landing Page? Since the default sign-up button can't be removed, you'd still follow the basic advice of the above button article. Clicking on that default button in the editor will allow you to customize it. For more info on creating these landing page forms, see our main article on the topic.