To send out reminders to submitters about an additional form, follow these steps:
Click Forms>Additional Forms.
Click on the Send Reminder button on the right side of the page. This will generate a dialog box that looks like this:
Fill in the appropriate fields to complete your reminder and click Send Message(s).
Note: Currently there is a 2,000 reminder limit on this feature. If you need to send more reminders of the same additional form, please contact Customer Support.