About Annotating Generative Sheet Metal Design Components

You can create annotations on the Sheet Metal Design components. These annotations are updated automatically when you fold or unfold the components.
  You can create FTA features on a sheet metal component in any view (folded or unfolded). They are created as per current geometry selected in folded or unfolded view.
These annotations are automatically updated with respect to the change in the view after you fold or unfold the view.
 
Folded View with Annotations Unfolded View with Annotations
  When you fold or unfold the sheet metal components, the assembly annotations such as perpendicularity can become invalid.