To populate the subheader with custom links and social networks, go to the Subheader section and set up the following options.
Step 1 – Background color and custom links
Start by setting the subheader background color (1), then add your custom links (2) by clicking on Add custom link.
When adding the custom links, insert the link label (3) and the link URL (4). To add other links, click on Add custom links (5).
Step 2 – Separator
When adding one or more custom links, a new option – Show separator (6) – will be displayed. Set to Yes to show a separator between the links, and set to No to show no separator.
This is an example of custom links with a separator.

Step 3 – Socials
You can now choose whether to show the social networks, which you can enable in the plugin General settings, through the option Show socials below the heading (7). By selecting Yes, you can choose the icon color (8) from White or Black.

This is an example of socials shown in the subheader.
You can now go to this page to learn how to set up the email template body options.