CADWorx Plant tab: Line Number > Annotate 
Line Number toolbar: Annotate
Plant menu: Accessory > Line Numbers > Annotate
Command line: NUMBERANNOTATE
Labels components with existing line numbers. The text size is based upon the CAD platform environment variable TEXTSIZE and is placed on the default text layer. You can select individual components to annotate. During the labeling process, a rubberband cursor appears indicating which component is being labeled.