To Open a Sheet Model from a Drawing Boundary Displayed in a 3D Design Model

In a 3D design model, open the View Attributes dialog ( Drawing > View > Presentation > View Attributes ).
In the View Attributes dialog’s Presentation section, turn on the Markers control.
The markers for saved views display in the model.
Hold the pointer on a callout or its marker which has its saved view referenced on a sheet model and has a drawing boundary.
The Mini toolbar appears.
Select the Display Sheet Annotations tool.
The sheet annotations including the drawing boundary are displayed.
Hold the pointer on the annotation of the drawing boundary.
In the Mini toolbar, select the Open Sheet Model tool.