View Multiple Reminders Lists

In the Mac Reminders app, you can click on a list in the left sidebar to view the items in that list. If you want to see all of the items in more than one list at the same time, you can use the Command key and select more than one list in the sidebar. Use the Shift key to select a range of lists. All of the items from all of the lists selected will appear on the right, organized by list.