Class definitions for components and lines contain two types of settings and properties—graphical and non-graphical. The graphical settings and properties control how the component or line is represented in a P&ID drawing. 
Non-graphical properties distinguish one component or line from another.
- For a component, you can specify the symbol and settings that control the insertion behavior of a component.
- For a line, you can specify whether flow arrows indicate the flow direction through a pipe.
You can create class definitions for both components and lines for general graphical properties such as layers, colors, schematic line types, linetypes, and lineweights.
You can also set the tagging prompt for both components and lines.