Completing reminders
Click the circle before a reminder’s title in the list to mark it complete (the circle fills in). Click it again to make it active once more.
A completed reminder stays on its due date (the square in the month grid fills in on that day too), even when you complete it after the due date. Only reminders without a due date are placed on the day you completed them.
Choosing which lists to show
Section titled “Choosing which lists to show”In Settings (⌘,), open the Reminders tab and use Active to pick the lists that appear.
Showing completed reminders
Section titled “Showing completed reminders”Whether completed reminders stay in the list is controlled by the Filter button at the right end of the bar, not by a setting. They are shown to begin with. See Filtering the list for how to change it.
Reminders without a due date
Section titled “Reminders without a due date”A reminder without a due date does not appear in the calendar or the list while it is active. Open it in the Reminders app or find it with search. Once you complete it, it appears on the day you completed it. How to set a due date is in Creating events and reminders.
Repeating reminders
Section titled “Repeating reminders”When you complete a repeating reminder, macOS creates the next occurrence. The one you completed stays on its original due date as a single reminder with the repeat rule removed, and the next occurrence appears as a separate, uncompleted reminder. There is nothing to advance by hand in Calinsight.
Open and overdue counts
Section titled “Open and overdue counts”The top of the Reminder Dashboard (⌘2) shows how many reminders are Open and Overdue right now, whatever the period (The Reminder Dashboard).