Permanent PDF Page Rotation Guide
Visual Verification
Inspect page orientations in the thumbnail view to locate upside-down or sideways scans.
Rotational Adjustment
Click the rotate icon on specific pages or rotate all sheets at once (+90°, 180°, 270°).
Save Structure
Save the document with permanent orientation tags written to the PDF dictionary tree.
ISO 32000 /Rotate Key: Zero Quality Degradation
Under the PDF specification, rotating pages does not recompress images or rewrite text stream coordinates. Instead, the viewer relies on the integer /Rotate entry in the page dictionary (values: 0, 90, 180, 270). PDFListo modifies this entry natively, maintaining 100% vector fidelity and identical file sizes.
Frequently Asked Questions about Rotating PDF
Browser viewers only rotate the screen canvas temporarily without saving to disk. PDFListo writes the rotation parameter into the file structure permanently.