Use annotation to indicate textual values on an object. These values might be attributes, such as object data; display properties, such as a line weight; or geometric values, such as the line direction. You can also add graphics to your annotation, such as arrows, static text, or other geometry, using standard AutoCAD drawing commands.
Annotation can have both textual and graphic contents. The textual contents, as well as properties such as layer, color, insertion point, and so on, are defined in the annotation template, and any values defined by expressions are determined when the annotation is inserted. When you add or remove textual elements or change properties or expressions in an annotation template, the existing annotations based on that template do not refresh automatically. Use the Refresh or the Update command to see those changes.