Detailed Drawings > Annotating the Drawing > Working with Datums > About the Behavior of Set Datum Tags Created in 3D Mode
  
About the Behavior of Set Datum Tags Created in 3D Mode
Displaying Set Datum Tags Created in 3D Mode
When a set datum tag annotation is defined in the model and then displayed in the drawing, the position and appearance of the set datum tag in the model are retained in the drawing.
Set the auto_show_3d_detail_items configuration option to yes to display the set datum tag annotations from the 3D model automatically in the drawing. You can also display the set datum tag annotations from the 3D model in the drawing view by using the Show Model Annotations dialog box. The display of a standalone set datum tag annotation or annotation elements in the model overrides any configuration options set in the drawing. For example, if in the model, the set datum tag annotation element is displayed as attached to the model by the edge of a flat surface with the plunger symbol, and in the drawing mode the gtol_datums Detail option is set to std_ansi, then in the drawing view the set datum tag appears as it was created in the model, even though it does not follow the ANSI standard.
If in a drawing, the set datum tag annotation is displayed in such a way that it cannot be displayed in the model, then the datum tag annotation is not displayed in the solid model, but only on the Model Tree. For example, if the set datum tag is attached to a created dimension or to a geometric tolerance in a drawing that is not visible in the solid model, then it is not displayed in the model, but only on the Model Tree.
 
* You can display the set datum tag annotations in multiple views in a drawing view, and with multiple attachments.
Modifying Set Datum Tags Created in 3D Mode
In a drawing, you can modify the set datum annotation elements created in the 3D mode, but you cannot unset the set datum tag annotation elements. However, you can unset or modify standalone set datum tag annotations created in the 3D mode.
When creating a set datum tag in a drawing, you cannot create a set datum tag similar to the set datum tag annotation in the 3D mode. Similarly, when editing or modifying the set datum tag from the Datum or Axis dialog box in a drawing view, you cannot create the set datum tag annotation as in the 3D mode.
However, in the drawing mode, you can modify a standalone set datum tag annotation that was created in the 3D mode. When modifying a standalone set datum tag annotation that was created in 3D mode, the 3D set datum tag annotation is available for the selected datum in the Datum or the Axis dialog box.
 
* If a set datum tag annotation of a model is created using the On Geometry option in the Datum or the Axis dialog box, then when editing the set datum tag in the drawing mode, the On Datum option is not available. Similarly, if the set datum tag annotation of a model has not been defined using the On Geometry option, then when editing the set datum tag annotation in the drawing mode, the On Geometry option is not available.
 
Extension lines created in drawings for set datum tags are not updated in the solid model. Extension lines are not supported for annotations in the 3D mode.
When a set datum tag annotation changes its reference, the tags previously displayed in the drawing for the old datum continue to reference the old datum, and revert to ASME tags if the gtol_datums Detail option is set to std_asme. If the datum for the new reference is already displayed in the drawing, that is, when the selected reference is a datum, then the tags in the drawing appear correctly. Otherwise, you must use the Show Model Annotations dialog box to display the tags for the new reference.
Set datum tags annotations in drawings reflect the correct reference of the solid model. If the reference of the set datum tag annotation is changed, then the drawing view does not show the set datum tag that points to an invalid reference. However, attachment points and the text position of the set datum tags are not updated between the drawing and the corresponding model.
Draft datums do not have the ability to be set to 3D set datum tag annotations.