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.

Locate the Rotate View submenu and choose either "Clockwise" or "Counterclockwise" to rotate the page view in 90-degree increments. This reorients pages from portrait to landscape, or vice versa.

Rotate PDF, Save PDF, Change Page View Layout, Read Aloud, Share PDF, Draw/Add Notes using PDF Viewer in Microsoft Edge.

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 ...