Open your PDF file with Adobe Reader. Click the "View" menu, point to "Rotate View" and then click "Clockwise" or "Counterclockwise" to rotate the document 90 degrees.

How to Convert an Acrobat PDF to Portrait or Landscape. Adobe Acrobat's toolset includes the ability to combine PDFs, bitmapped images and other document resources into files that contain pages of ...

Learn how to rotate just one page of a multi-page PDF in Preview.

It's not immediately obvious, but when viewing PDF documents in the Files app, there are hidden tools that enable you to rotate pages, add blank pages, insert images, delete pages, and even scan ...