What must be configured in order to restrict visibility of picklist values to certain users?

To restrict visibility of picklist values to specific users, configuring record types is essential. Record types allow you to categorize records and define which picklist values are available for each category. By creating different record types, you can assign them to different profiles or user roles, thereby controlling which users see certain picklist options based on their assigned record type.

When a user accesses a picklist field, the available values are determined by the record type associated with their profile. If a user has access to multiple record types, the values shown will change according to the selected record type, ensuring that users only see the options relevant to their role or the specific context of their work.

While user permissions can control overall access to records, they do not modify the visible picklist values directly. Field-level security ensures that users can view or edit fields but does not intersect with the options available in picklists. Page layouts control the presentation of fields but again do not specify which picklist values are visible for different users. Thus, record types are the definitive element necessary to limit which picklist values users can see based on their profile or role.