How do i change one page to landscape and the rest portrait?

[sexihunnibunni]

I need to have my document in portrait, but i have a diagram which is
landscape and i want that one page to be turned into landscape and the rest
of the document to be portrait. how can i do this?

 

[PJY]

Insert a section break on the portrait page before the page you want
landscape, then insert a section break on the landscape page, then change
that page to landscape

 

[Suzanne S. Barnhill]

See the first part of
http://word.mvps.org/FAQs/Formatting/LandscapeSection.htm