All active and past reminders of an issue are displayed on the “Reminders” right of an issue. Active reminders are shown with a yellow post-it, and completed reminders are shown with a light blue post-it with a check mark on it.

You can also add new reminders or delete, edit existing reminders depending on the  permission you have. For every reminder following information is displayed:

• Reminder’s recipient: For  reminders with multiple recipient “Multiple Recipient” is displayed and if you hover on it, all recipients will be displayed in a tool tip. If recipient is a single user, hovering over it will show further details about the user.
• Reminder’s trigger time: The date on which the notification email will be sent or for expired notifications the date on which the reminder email is send. 
• Reminder’s summary: If you hover on summary information, description of the reminder is also displayed as a tool tip. Hovering on reminder summary will show full reminder description as a tooltip as shown on below screenshot.