The case Calendar tab focuses the schedule on one case.
Select a calendar day to open the available New Task or New Event choices when your permissions and the case status allow creation. Review any prefilled date before saving.
The case Activities tab separates Events and Tasks and provides search, status filtering, and permitted edit, duplicate, completion, or deletion actions. It is also useful for undated tasks.
Intake, closed, or read-only statuses can restrict scheduling actions. Having View Calendar does not automatically give Add Activities, Edit Activities, or Modify Activity Status.
A reopened case is a separate instance. Check the case number if expected work appears to be missing.