This sets the timeout (in seconds) for how long the Application Server can take when performing Save to File using Default / Tiff format or the Store Copy as Image on Initial Submit option. If the timeout is exceeded, the task will be canceled and the image rendering of the form will fail. A message will be logged to the Diagnostics Console stating that the timeout was exceeded. The default timeout is 60 seconds.
<add key="FormSaveToTiffTimeout" value="60" />