Annotation is text placed in a drawing to describe a component or line. It displays the properties or tag data of a component or line.
Following is an example of a horizontal centrifugal pump annotated with a pump tag and a pump InfoTag:
Annotations are linked to the properties, or data, of the component or line. If the data changes, the annotation updates accordingly. However, not all annotations are linked visually to the component or line. You can add freestanding annotations, which do not move in the drawing when you move a component or line, or linked annotations, which move with the item. Linked annotations might include an instrument bubble or an equipment InfoTag.
Some annotations (such as valve size) are displayed automatically, and some require that you place them in a drawing.
Components and lines are not required to have tag data before you annotate them. For example, you can annotate an item with its size, manufacturer, and so on.