Setting up a MailerLite Signup Form
Click Add Element
Click Form to create a new Form element.
Set Type to Signup, then Via MailerLite.
Enter your MailerLite API Key, which can be found by following these instructions.
Enter your MailerLite Group ID, which can be located under "Subscriber Groups" on your Developer API page.
(Optional) Click the Fields tab and rename or toggle the form's fields. Note that some fields may require you to add additional custom fields to your group.
(Optional) Click the Button tab and change the form's submit button Label.
You're done! The site should now have a fully functional MailerLite signup form.