These properties affect the symbol component. By default, the Symbol section has only the Symbol property. The symbol's own parameters are listed below it. To create more properties for a particular symbol, open the Edit Properties dialog for that symbol. If the symbol's parameter layout defines sections, each section appears as a separate collapsible section of the Property Inspector, marked with a symbol icon.
For a guide to using symbols, see Symbols.
Symbol components are also affected by Common Properties and by custom parameters that you define.