I would like to add a custom drop down or check boxes that would allow people to select what list they are signing up for. multiple segments that have different interests and I want to customize the content they are receiving without throwing them all into the same list.
I am new to Constant Contact.
Thanks for reaching out to Constant Contact's API Support.
This specific type of drop down menu is not something that is available in the sign-up forms provided by Constant Contact. You can create this on your own using our API endpoints however. Please take a look at our documentation located here (https://developer.constantcontact.com/docs/developer-guides/overview-of-api-endpoints.html).
You can use the Contacts end points and Contact Lists endpoints to create something using our v2 API, or you can our Sign-Up Forms & Tools section which does not use the API directly, but instead uses a POST URL to submit your contacts. That information is located on the same page, but for easy reference here is the link (https://developer.constantcontact.com/docs/signup-forms-tools/signup-form-creation.html).
If you have any questions you are welcome to reply here or email us at email@example.com.