It’s very easy to change the default “Subscribe” button shipped with the default configuration of the Newsletter plugin:
- Go to List Building -> Subscription Form Fields panel from the dropdown menu
- Locate the Button labels in the Main profile fields tab
- You can change the Subscribe button text and the Save button text (for the profile page). For “subscribe” insert an URL to an image (http://…) to use it as a graphical button.
- Save and you’re done!