Model-Based Definition > Model-Based Definition > Creating Various Annotation Types > Dimension Properties > Working with Dimensions > About Modifying Attachment References for Dimensions
  
About Modifying Attachment References for Dimensions
You can modify the attachment references of all 3D dimensions such as driven or reference dimension Annotation Elements in 3D mode using the ATTACH TYPE menu that appears in one of the following ways:
When you click Edit Attach in the Dimension Properties dialog box. The Dimension Properties dialog box opens when you click Edit in the ANNOTATION FEATURE dialog box or when you right-click the dimension on the Model Tree or in the graphics window and click Properties on the shortcut menu.
When you click Edit Attachment on the shortcut menu that opens when you right-click the annotation on the Model Tree or in the graphics window.
When modifying the attachment references, you cannot create or select a different baseline reference for the dimension. You can modify the attachment reference of an ordinate baseline Annotation Element in 3D mode by replacing the reference from the ANNOTATION FEATURE dialog box.
When you edit the attachments for a driven or reference dimension Annotation Element, the new references replace the automatically generated Annotation Element references.
 
* You cannot undo or redo the changes to the dimension attachment references for ordinate baseline Annotation Elements. Therefore, you must be careful when modifying attachment references for ordinate baseline Annotation Elements as changing the references could cause the dependent ordinate dimensions to fail.