Public PDF split example: use a synthetic document

To explain a PDF split issue publicly, use a short synthetic PDF with numbered pages and harmless text. State the physical page range selected and show which pages appeared in the output. Avoid sharing a real document, since excluded pages may still contain private metadata or attachments in a poorly processed file. Check the generated sample in another viewer. A numbered test file makes off-by-one errors clear without disclosing someone else's content.