From: "Nancy Gish" <[log in to unmask]>
> I should have noted that. But according to my Arden Shakespeare the
> First Folio text "was probably revised by Shakespeare." Clearly that is
> not known for sure. Interestingly, the actors did not even have
> complete scripts; they had just their own sections because it would have
> been too much to produce.
It was also done for preventing piracy.