Liquid Templating

To add a link to view an email in your browser:

{{ browser_url }}

This link is public and anyone can access it.

If you want to link to the unsubscribe page:

{{ visitor.unsubscribe_url }}

If you want to reference a specific custom field:

{{ visitor.first_name }}

All standard liquid templating logic works in Bento, so you can also do:

Hello {% if visitor.first_name == blank %}there{% else %}{{ visitor.first_name }}{% endif %}