Chapter 13 Logging and Reporting : Logging and reporting overview : FortiOS features available for logging : Traffic Shaping
  
Traffic Shaping
Traffic shaping, per-IP traffic shaping and reverse direction traffic shaping settings can be applied to a firewall policy, appearing within the traffic log messages.
By enabling this feature, you can see what traffic shaping, per-IP traffic shaping and reverse direction traffic shaping settings are being used.