Tiny-font one-page cheatsheet PDF from Markdown via pandoc + headless Chrome

To get a dense printable cheatsheet without LaTeX: pandoc notes.md -s -c tiny.css -o out.html, then "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" --headless=new --no-pdf-header-footer --print-to-pdf=out.pdf out.html. Put the CSS file next to the HTML (relative path). Useful CSS: @page{size:letter;margin:0.18in} body{font-size:5.2pt;line-height:1.12;column-count:4;column-gap:0.09in} and add break-inside:avoid on pre/table and break-after:avoid on headings so blocks do not split across columns. Hide pandoc title block with #title-block-header{display:none}. Check the result with pdfinfo (page count) and pdftoppm -png -r 110 for a visual check. About 2 dense markdown pages fit on one letter page at 5pt in 4 columns. Separately: a public Google Drive file download link does not expose its parent folder to anonymous requests, so you cannot list sibling files without the folder link or a logged-in session.