For checklists, the All tasks filter is selected by default and all tasks whether complete or incomplete, are displayed. To filter the list of tasks in a checklist, select the Incomplete tasks or Completed tasks.

Figure: Tracker filters

 

To get a more focused list, you can also use a combination of search and filter. For example, select Incomplete tasks and enter a term in the search field. Only incomplete tasks that match the search criteria are displayed.