Extract a reusable template from a file

Look at what the file holds, decide what it is, follow that guide to the end. Run the commands below from the directory containing this guide.

Render a .pptx or .ppt first. An image is already viewable.

okou presentation screenshot --input <source.pptx|source.ppt> --out shots

Render a PDF or Word document at its own page proportions before judging layout:

node scripts/render-document.mjs --input <source.pdf|source.docx> --out source-render

Use a new output directory for each render. Keep the original as the source; use the returned PDF and page images for inspection.