[User Interface and Navigation] Which form element displays the list of activities, or history, on a task form?

The Activity Formatter is a standard element on ServiceNow forms, particularly those extended from the Task table (e.g., Incident, Problem, Change). It provides a chronological, time-stamped history of all actions and changes related to a specific record. This includes updates to field values, work notes, additional comments, emails sent/received, and other system-generated events. It is the primary tool for users to track the lifecycle and progress of a task.

A. Sidebar: A sidebar is a general user interface pattern, but it is not the specific name for the element that displays record history on a ServiceNow form.
B. Action Stream: This is not a standard ServiceNow term for a form element. The correct term is Activity Formatter, which displays the activity stream.
C. Action Formatter: This is not a recognized type of formatter in ServiceNow. The correct and official name for the history element is the Activity Formatter.

1. ServiceNow Product Documentation - Utah Release: Activity formatter. This document states, "The activity formatter provides a chronological summary of all activities that have occurred for a specific record." It details how it displays field changes, comments, work notes, and emails.

2. ServiceNow Product Documentation - Utah Release: Formatters. This page explains that formatters are used to add non-field information to a form. It lists the "Activity stream" (which is displayed by the Activity Formatter) as a primary example, stating, "Add an activity stream to a form to show a log of all the changes that have been made to a record."

3. ServiceNow Developer Documentation: UI macros. The Activity Formatter is powered by a UI Macro, typically named activity.xml. This documentation explains how UI macros are used to create custom controls and interfaces, including formatters, on forms.