The default widget button appears on your product page when an out of stock product is selected.
You can easily replace this button with your own.
1. Create an image for your button in PNG, GIF or JPEG format. The dimensions of the image can be whatever you like.
2. The Back In Stock - Restock Alerts will detect it automatically.
3. Upload your custom button to your store theme using the template editor.
If you have any trouble customizing your widget, please reach out to us for support.