netbox-community-netbox/netbox/templates/dcim/interface_create.html

{% extends 'generic/object_edit.html' %}

{% block buttons %}
  <a class="btn btn-outline-danger" href="{{ return_url }}">Cancel</a>
  {% if component_type == 'interface' and perms.ipam.add_ipaddress %}
    <button type="submit" name="_assignip" class="btn btn-outline-success">
      Create & Assign IP Address
    </button>
  {% endif %}
  <button type="submit" name="_addanother" class="btn btn-outline-primary">
    Create & Add Another
  </button>
  <button type="submit" name="_create" class="btn btn-primary">
    Create
  </button>
{% endblock %}