Rotating scanned pages upright
A scanner feeding a bundle at the wrong angle produces pages that are technically legible and practically unreadable. Rotating them is a two-click job, and it does not require re-scanning.
Why scans land sideways
Two causes account for most of it. Pages fed in landscape orientation get captured as landscape and then displayed inside a portrait page, so the content appears rotated. Or the scanner’s automatic orientation detection guessed wrong on a page with little text — a plan, a photograph, a signature page.
The tell is that the page looks rotated but the paper size is wrong for what it contains: a landscape page sitting in a portrait bundle.
All pages or only some
Where a whole document was fed the wrong way, rotate every page 90 degrees clockwise. Where two pages out of eighty are wrong, select only those pages by number — rotating the whole file would put the other seventy-eight on their side.
Landscape plans inside a portrait bundle are a special case: they are usually correct already, and should be left alone.
Check pagination afterwards
Rotation does not move anything on the page, so existing numbers rotate with the content — which is what you want if the numbers were part of the scan, and not what you want if they were stamped onto a page that is now sideways. If you numbered the bundle before noticing the rotation, number it again after rotating.
Does rotating lose quality?+
No. Rotation changes a page attribute; the image data is untouched, so there is no re-encoding.
Can I rotate only specific pages?+
Yes — type the page numbers or ranges, and only those pages are changed.
Will the content still be selectable after rotating?+
Yes, where the page has a text layer. Rotation does not flatten the page.
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