This method does nothing if FixedSize is true. Otherwise it increases the Size property and moves the TopLeft point farther towards negative coordinates as needed to include the obj's bounds. By default this method never shrinks the document. Note also that this method is not called while SuspendsUpdates is true. If you do add objects or modify their bounds while SuspendsUpdates is true, afterwards you can explicitly set TopLeft and Size to accommodate the new or modified document objects.