Use cases
- Format controlCheck that all pages are in A4/Letter, detect landscape pages or those with rotation.
- Prepare a split/mergeGet a clear view of the pages before cutting or merging (number, dimensions, order).
- Display debugUnderstand cropping (CropBox) or unexpected margin issues depending on viewers.
- AutomationFeed a pipeline that routes PDFs based on the number of pages, format, or orientation.