Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.
Where: This change applies to Lightning Experience in Group, Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.
Why: Activity timeline shows details for each task, event, and email in an expandable timeline view.
Related lists shows details for each task, event, and email in the Open Activities and Activity History related lists. Users who are familiar with Salesforce Classic might feel more at home working with the related lists activities view.