About the System Symbols Area
The symbols directory contains libraries of Creo Parametric symbols that are available with the Detailed Drawings module. This area is usually read-only.
The Welding Symbols Library, for example, provides a collection of generic system symbols according to the ANSI standard, and a collection of symbols according to the ISO standard. Using this library, you can create a variety of welding, brazing, and examination symbols in a drawing. Before you create an instance, familiarize yourself with the procedure for adding custom instances.