In an email template, what does the HTML tab allow users to access?

The HTML tab in an email template allows users to access the source code of the email. When editing an email template, it is crucial for users who have a technical background or want to customize their emails beyond the default settings to have direct access to the underlying HTML. This capability enables them to modify layout, style, and other HTML attributes in a way that standard formatting tools may not provide.

In contrast, imaging options pertain to graphic design elements within the email, which may not necessarily involve direct coding. User preferences refer to settings related to how individuals would like to receive or interact with communications, rather than the content of the email itself. Lastly, statistics of email performance focus on metrics and analytics that arise after the email is sent, greatly differing from the ability to edit or create emails via their HTML code.