I think I find it. if you want to transfer a sketch element or an annotation from a view to another one:
Select an annotation or a sketch, press Ctrl+x (cut) or Ctrl+c (copy) and then click on the view you want to paste it. When the border of the view is dot orange you can paste it: Ctrl+v. Your annotation or sketch is now associate with the view. Do not use the right click mouse option "Copy Entities" because you could not associate with the view.