Related list customization on page layouts
Key Takeaway
You choose a related list's fields, sort order, and buttons on the page layout. In Lightning Experience, the related list type controls how many fields show, and you change it in the Lightning App Builder.
A related list on a record page shows records from a related object. For example, the Contacts related list on an account record shows that account's contacts. App builders customize related lists in the page layout editor. In Lightning Experience, they set some related list options on the Lightning page in the Lightning App Builder instead of on the page layout.
What you can and can't customize
You can customize these parts of a related list:
- Which fields appear as columns
- The column order
- The record sort order
- Which buttons and actions show
You can't customize some related lists at all. The History related list links to data stored elsewhere, so you can't customize it. Notes & Attachments, Contact Roles, and Account Team are locked on every object where they appear.
A page layout can have up to 100 related lists. You can't add related lists to page layouts for the User object.