Your scanner output is a mess. Some pages are portrait, some landscape, two are upside-down. The document loader doesn't auto-orient, or it does but gets confused by mixed page types.
Fixing rotation issues across an inconsistent scan is exactly what Flint is built for.
Survey first, then act
Open rotate PDF pages and scroll through the thumbnail grid. Note which pages are wrong and how (sideways, upside-down, correct). For a typical scanned document you'll find: 80% correct, 10% sideways one direction, 5% sideways the other, 5% upside-down. Fix each subgroup as a batch.
Select-by-condition, rotate-by-group
Select all the upside-down pages, hit 180°. Select all the sideways-left pages, hit 90° CCW. Select all the sideways-right pages, hit 90° CW. Three batched operations vs 30 individual rotations.
Re-scan if rotation isn't the only issue
If the scans are also skewed (rotated by a few degrees, not 90), Flint can't fix that — rotation here is at 90° increments. A skewed scan needs de-skewing, which means scanner software or a dedicated image tool. Re-scan with the document loader properly aligned.
Set up scanner defaults to prevent next time
Most scanners have an 'auto-orient' setting based on text direction. Enable it. For scanners without it, train yourself to feed pages consistently. Worth ten minutes of setup to avoid this entire exercise for future scans.
FAQ
Can Flint detect rotation automatically?
Not currently. Auto-orientation requires text analysis which Flint doesn't do during rotation. You inspect and select.
What about diagonal skew?
Skew correction is a separate operation. Re-scan or use a dedicated image tool. Flint handles 90° increments.
Does rotation help OCR?
Yes. OCR engines work best on right-way-up text. Rotate first, OCR second.
Can I crop while rotating?
Separate steps. Rotate in rotate PDF pages, crop in edit PDF.
Inspect, group, rotate, save. Fix scanner rotation.