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Chart annotations

Annotations allow you to mark specific dates in your web performance charts.

For example, you could add an annotation when:

  • a new release is deployed
  • a new image was added to your homepage
  • your CDN adds support for a new image format
  • you enable HTTP/2 on your server

Annotation markers in performance timeline

How to add a chart annotation

  1. Click Show annotation in the sidebar while viewing a monitored page

Show chart annotations checkbox

  1. Click Add annotation
  2. Enter the name of the annotation in the Title field
  3. Click Create

Edit annotation UI

Now the new annotation has been created.

Annotation has been created

Limiting annotations to specific pages

By default annotations are added to all pages in a project. You can change this using the Apply to dropdown.

  • Project: add annotation to all pages
  • Subdomain: add annotations to this hostname, for example
  • URL: add annotations to all pages with the same URL
  • This page: only add annotations to this specific monitored page

Adding annotations to specific pages