Final answer:
A timeline or status bar displayed at the top of a case form provides a visual overview of case activities, indicating progression from initiation to the present.
Step-by-step explanation:
The visual display at the top of a case form that depicts case activities is typically known as a timeline or status bar. This graphical element is designed to provide users with a quick overview of the progression or status of a case, often in project management or customer relationship management (CRM) systems. The timeline might display key milestones or events that have occurred from the initiation of the case, often labeled with significant points such as 'Big Bang', and tracking forward to the present.
As an educational representation, the provided image showing the progression from the 'Big Bang' to the 'Present' with an arrow indicating the direction of time can serve to metaphorically demonstrate how a timeline functions in tracking activities over a period.