What's a reference designator?

Reference designators are sequenced comments and instructions that pertain to a component.

For example, you may have drawings that clarify the assembly process for certain components, or further instructions for the use of a large quantity of the same component. You can specify whether to assign one reference designator for every usage of the component or assign any number of reference designators to the component. Planning bills and model, option class, and planning components can't have reference designators. You can also specify a comment for each reference designator.