Mixpanel has introduced a feature that allows users to annotate data points within their Segmentation graphs to better understand the impact of product updates on customer engagement. Users can create annotations by hovering over data points and entering information, which will then be displayed in a table beneath the graph and highlighted on the chart. There's also an option to have annotation highlights persist on the chart by default, a setting that is saved to the user's account. These annotations can be used to track events like product releases or A/B tests, and Mixpanel provides an Annotations API for automatic creation of annotations during events such as application deployments. For support or feedback, users can contact Mixpanel directly.