Go to Tool Settings and click on Opt-In and HTML-Code to create a Newsletter registration form.
Its HTML Code is generated automatically and can be embedded into any website.
For the Sign-Up Form all standard data fields and specific additional custom-fields of your contact data base can be used. You can add and administer custom fields in the Suite Manager client, which you can implement in the tool settings in the client for your HTML Code.
By clicking on Advanced, fields can be assigned with a predefined value (default value) or can be held hidden form fields. This helps for example to trace the origin of the address, if multiple websites are being operated without the subscriber seeing the allocation.
When you copy&paste your HTML Code you can see the form in your existing website.
The newsletter registration of your website is then linked to your eyepin data base.