Initiates immediately after a form filler saves a form in PDF or XDP format. This event does not initiate when you export a subset of the form (for example, only form data) to XDP.
You can use this event to display information messages to the form filler after the form data is saved. For example, you can create a script on the postSave event to remind form fillers how much time remains for them to successfully complete and submit the form.
See also 

postSave event