How to use it
- Choose the PDF.
- Set top, right, bottom, and left percentages.
- Crop and check that nothing important was cut off.
Scans often include a dark scanner edge or a wide blank border. Cropping pulls the page inward from the sides you choose. The same percentages are used on every page, which is what you want when a whole stack was scanned the same way.
This changes the visible page box. It is not a freehand crop of one picture region. If you only need to hide a sentence, use Redact, which blacks out an area and flattens that page so the text is gone.
Questions
Can I crop a single page differently?
Not here. Every page uses the same margins. Split that page out, crop it, and merge it back if you need an exception.
What happens if the crop is too large?
SKY13.app stops instead of writing a tiny unusable page. Lower the percentages and try again.