Hello,
Thank you very much for choosing our theme and for contacting us.
1. Create a menu in Appearance > Menu, save > enter the menu item and find CSS classes field in Custom fields [for theme] insert the class woodmart-open-newsletter
then go to the Theme Settings > Shop > Promo popup, enable and configure the popup.
2. Enter the menu item and find Icon name (from FontAwesome set https://fontawesome.com/v4.7.0/icons/) – the field requires to insert the key work from FontAwesome icon. For example, ID cart icon code looks like <i class="fa fa-id-card-o" aria-hidden="true"></i>
, it is necessary to extract the part, which determines the icon which is id-card-o
Best Regards