Build the structure in the original document
Use the word processor's heading styles for genuine headings rather than making ordinary text larger and bold. That gives the document a hierarchy the export process can preserve. Keep levels consistent: a subsection should sit beneath the section it belongs to.
Add meaningful link text instead of a page full of unexplained addresses. Check tables for clear headers and images for useful alternative text where needed. These choices improve the source document as well as the exported PDF.
Run the application's accessibility checker and address the issues you can. A clean checker result is helpful but does not prove the final file is accessible in every respect. It is one part of a review, not a substitute for reading and navigating the output.
Use export options that preserve meaning
Prefer the application's supported PDF export or save function when it preserves document tags, links and bookmarks. Printing to a PDF may produce a visually similar file while losing some structure, depending on the software and settings.
Microsoft documents options for creating accessible PDFs from its applications. The available choices vary by platform, and some conversion options use an online service. Check that behavior before exporting confidential material.
If the export offers bookmarks based on headings, enable them where appropriate. They can make a long PDF easier to navigate in readers that display a bookmark panel. Keep the headings descriptive enough to make sense outside the surrounding paragraph.
Inspect the PDF as a separate document
Open the exported file in a reader and check page breaks, tables, footnotes and images. A heading stranded at the bottom of a page or a table cut off at the margin can appear even when the source looked acceptable.
Test several internal links and bookmarks. Search for a distinctive word, select a passage and check that the reading order is sensible. If the PDF contains forms or attachments, test those features too rather than assuming they survived export.
Review the document title and file name. A descriptive name helps recipients distinguish the final version from a draft. Remove comments, tracked changes or hidden content that should not be part of the shared document, using the application's supported inspection tools.
Keep the editable source
Retain the original document beside the final PDF in your own archive. A PDF is useful for distribution, but later changes are usually easier and more reliable in the source.
When a revision is needed, update the source and export again rather than accumulating separate edits in multiple PDF copies. Check the new export after each material change. A dependable long document is one whose structure, appearance and version all tell the same story.
