Check the announcement on the theme your shoppers actually use. Shopify themes, other apps and sticky headers can affect the final layout, so an editor message preview alone is not a complete storefront test.

Check the basics

  1. Confirm the app embed is enabled and saved on the intended theme.
  2. Use a short test message in a notice that is published, enabled and currently eligible.
  3. Open desktop and mobile theme previews, then check the actual storefront.
  4. Review message wrapping, contrast, the close button if enabled, and any paid-plan link.
  5. Test both before and after scrolling if the theme has a sticky header.

A demonstration announcement wrapping across multiple lines in a Shopify mobile theme preview

October 2026 development-store example. Your theme, app version and plan can produce a different appearance.

Sticky-header or overlapping-bar problems

The app embed includes Keep bar at the top while scrolling. If the announcement overlaps another sticky element, switch that option off in App embeds → Synexa Holiday Notice, save, and retest. Check whether the theme or another app already adds its own announcement bar.

Avoid publishing changes to a live theme solely to diagnose a layout issue. Where possible, test an unpublished theme copy and compare relevant theme/app settings. The app's current interface does not include a bottom-position selector or animation controls.

Long text or unreadable colors

Shorten the message, place secondary details on a linked page if your plan supports links, and choose colors with sufficient contrast. The editor's contrast warning can help, but still check the real storefront. HTML is not supported in the message.

After switching themes

Enable and save the app embed on the new theme. Activation on an old theme does not establish activation on another one. If the dashboard's status is unknown, check the toggle directly.

For support, provide the theme name/version, affected screen size, whether sticky positioning is on, and a screenshot without private information. No blanket compatibility guarantee is implied for every theme and app combination.

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