Are you sure you have only just updated to 12.5? The current version of BikeCAD is 13.0. Version 13.0 has been available since October 2016.

A new option introduced in version 13 is the ISO recommendations on steering geometry: bikecad.ca/steering_iso. There are other dimensions that relate to steering geometry such as trail, head angle, and fork rake, but there is no specific section for steering related dimensions.