Considerations for the Activity Composer and Activity Timeline in Lightning Experience | Salesforce
Considerations for the Activity Composer and Activity Timeline in Lightning Experience
In some Salesforce orgs, page layouts or record types need adjustments to prevent tabs from disappearing from the activity composer. Also, if you customize the display and order of fields in the activity timeline, be aware of the behavior of certain fields.
Available in Lightning Experience in: Professional, Enterprise, Performance, Unlimited, and Developer Editions
Considerations for the Timeline and Activity Related Lists On the detail page for objects that support activities, Lightning Experience doesn’t display the Open Activities and Activity History related lists along with other related lists. It displays the activity timeline instead. Objects that support activities include opportunities, leads, accounts, contacts, contracts, and custom objects on which you enable activities.
Considerations for Customizing Activity Timeline Fields You can use compact layouts to customize the display and order of fields for items in the activity timeline. Be aware that certain essential fields remain in the timeline even if you delete them from a layout. Icons in the timeline aren’t customizable.