When you work on a document on your Mac using Apple's Pages application, such as a brochure, you might want to change the page orientation; for example, create it in horizontal landscape instead of vertical orientation. Pages is a desktop publishing program that comes included in Apple's iWork suite of applications, along with spreadsheet and slideshow presentation programs, that will allow you to change page orientation simply.
Click "Applications" on the Dock of your Mac, click "iWork," and then click "Pages" to launch the application.
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Click "File" from the Pages menu, click "Open Recent" if you want to open a recent document, and then click the name of the document to open it. Or, click "File," "Open," and then click a folder on your Mac containing the document you want to open, click the file to select it, and click "Open."
Click "File," and then click "New" to create a new document. The Template Chooser window appears. Click a template on which you want to base your new document, and then click "Choose." A new blank document appears.
Click "Inspector" at the top of the Pages application window. The Inspector pallet appears.
Click "Page Setup." A dialog box appears.
Click an icon next to "Orientation" to change the page orientation, selecting either Vertical or Landscape mode.