If you’re working on a long document and want parts of the document to have Landscape page orientation, you can do so by following the steps outlined below:

1. Separate the sections that you want to apply different page orientations to by a Next Page Section Break. You can apply a Next Page Section Break by choosing Insert | Break from the menu bar and selecting the Next Page option button under the Section Break Types panel of the Break dialog box. (In 2007, select the Page Layout tab on the ribbon and choose Breaks.)
2. Select the text/pages you want in Landscape orientation and choose File | Page Setup from the menu bar. (In 2007, click on the arrow in the lower-right corner of the Page Setup area of the Page Layout ribbon to open the Page Setup dialog box.)
3. Choose the Landscape orientation and then, in the Apply To dropdown box, choose Selected Text.

This will create a document partially formatted using Portrait orientation and partially using Landscape orientation.