When rotating a PDF is the right fix
Page rotation is useful when a scanner, camera, or export tool has turned every page the wrong way. It is a quick structural fix and usually faster than editing each page manually.
Best for full-document orientation problems
If every page is sideways or upside down, rotating the full file is the cleanest approach.
Good for office and study workflows
Use it for lecture notes, invoices, contracts, and exported reports that need a readable orientation before sharing.