---
title: "HTML and field types (legacy templates)"
slug: "html-field-types-1"
description: "Fields and template logic for pre-2022 Opensense templates that use $tag; syntax: conditional and hidden fields, internal and external wraps, and sender email."
updated: 2026-10-13T00:00:00.000Z
canonical: "https://help.opensense.com/docs/html-field-types-1"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.opensense.com/llms.txt
> Use this file to discover all available pages before exploring further.

# HTML and field types (legacy templates)

## Overview

These articles explain the fields and template logic you can use in pre-2022 templates. These templates use tags in `$tag;` format. If your template uses Liquid tags such as `{{field}}`, use [HTML and field types (Liquid templates)](https://help.opensense.com/docs/html-field-types) instead. To move a template to Liquid, see [Converting to Liquid templates](https://help.opensense.com/docs/converting-to-liquid-templates-pre-2022-legacy).

## Articles

<dl class="kb-insights-summary">
  <div><dt><a href="https://help.opensense.com/docs/conditional-fields-pre-2022-legacy">Conditional fields</a></dt><dd>Show a field only when the user has a value for it.</dd></div>
  <div><dt><a href="https://help.opensense.com/docs/hidden-fields-pre-2022-legacy">Hidden fields</a></dt><dd>Use fields that do not appear in the signature block or in MySig.</dd></div>
  <div><dt><a href="https://help.opensense.com/docs/external-and-internal-wraps-pre-2022-legacy">External and internal wraps</a></dt><dd>Show different content to recipients outside and inside your domain with <code>{if_sgexternal}</code> and <code>{if_sginternal}</code>.</dd></div>
  <div><dt><a href="https://help.opensense.com/docs/displaying-sender-or-recipient-email-pre-2022-legacy">Sender or recipient email</a></dt><dd>Insert the sender or recipient email address with <code>$sgsender;</code> and <code>$sgrecipient;</code>.</dd></div>
  <div><dt><a href="https://help.opensense.com/docs/web-safe-fonts">Web-safe fonts</a></dt><dd>Choose fonts that display the same on all devices and platforms.</dd></div>
</dl>

## What's next

- [Designer Studio for legacy templates (classic UI)](https://help.opensense.com/docs/designer-studio-pre-2022-legacy)
- [Converting to Liquid templates](https://help.opensense.com/docs/converting-to-liquid-templates-pre-2022-legacy)

For further help, contact Opensense Support at [help@opensense.com](mailto:help@opensense.com).