Mixing LaTeX and Markdown

Several ways to do this.

Latex in Markdown files, markdown in Latex files, and conversion between the two...

https://mathpix.com/markdown-to-latex
https://www.overleaf.com/learn/how-to/Writing_Markdown_in_LaTeX_Documents

Interesting to me was the ability to do syntax highlighting from markdown... it seems easier than listings and might work better than XML for use with XLingPaper

Extracting images from PDFs

Every now and again I need to extract some images from a PDF. The best solution I have found is to use pdfimages on the command line in linux.

https://www.howtogeek.com/228796/how-to-extract-and-save-images-from-a-pdf-file-in-linux/

Get the tool in poppler set of tools as XPDF is out of date.
https://poppler.freedesktop.org/

Other helpful tools:

https://www.cyberciti.biz/faq/easily-extract-images-from-pdf-file/
https://askubuntu.com/questions/150100/extracting-embedded-images-from-a-pdf
https://superuser.com/questions/134869/how-to-extract-image-from-pdf-file
https://commons.wikimedia.org/wiki/Commons:Extracting_images_from_PDF