> [!NOTE]
> **Note:** If you experience issues with your annotation, email [p-Promo-Outreach@google.com](mailto:p-Promo-Outreach@google.com).

To preview your email annotations, edit the following code or write new code. To
find JSON-LD and Microdata templates, see the
[Overview](https://developers.google.com/workspace/gmail/promotab/overview).

This preview tool provides a glimpse of how your annotation appears in your
subscribers' Promotions tab. It also detects potential issues with your
annotation, offering error messages to help you address them. The tool checks
for compliance with image quality filters, proper syntax, supported image
aspect ratios and sizes, valid image formats, and supported URLs.
<iframe style="width: 100%; height: 100vh;" src="https://www.google.com/gmail-for-marketers/promo-tab/markup-tool/embed"></iframe>