If your PDF document isn't in the correct orientation for easy reading, trying to rotate it and keep it the right way up can be a frustrating process. With free PDF programs such as Adobe Acrobat ...

Sometimes the size of a PDF file is not ideal. Single-page PDFs may be too large or too small for your needs, while a multipage document may have some pages scaled in letter size, others in legal size ...

Developed 30 years ago by Adobe, the Portable Document Format, or PDF, is widely used around the globe for viewing and signing documents – everything from corporate annual reports and scientific ...