Click
File|Send To|Mail Recipient

It's difficult to notice, but that icon is depressed--you can click it again to
toggle off the envelope.

graymatter606 wrote:

This morning the email header (to, from, subject, intro) suddenly appeared in
one of my most-used Excel spread sheets. It takes up a lot of screen space,
and I don't want it there. Neither View, Customize, or Options does anything
to help, though when the Customize dialog box is open, the email header
vanishes only to reappear when I close the box.

--

Dave Peterson