GUIDE深度 · Deep dive
Page Rotation vs Content Rotation
PDF page rotation is a `/Rotate` attribute: viewers display it rotated while content coordinates stay the same; some tools bake rotation into the content matrix. Print results are usually the same, but later editing/OCR may differ, so keep a copy.
Metadata rotation: light and reversible.
Baked rotation: changes the content matrix, often more compatible.
Some viewers ignore invalid /Rotate values.
Preview before printing.
FAQ
Why did printing ignore the rotation?
The viewer/driver ignored the angle; try another tool or bake it.
Are bookmarks lost?
Pages are usually kept; bookmarks/forms may be affected, so check the copy.