LuaLatex Version 1.13.2 (TeX Live 2021) prints a warning (pdf inclusion): PDF inclusion: found PDF version '1.7', but at most version '1.5' allowed
How should I generate PDF 1.7 files? Hyperref has an option pdfversion
, but the documentation starts with "This is an experimental option."
Best Answer
hyperref should work, the only problem can be that there can be packages which already open the pdf and then hyperref is too late. Before \documentclass you can set the version like this:
With an older LaTeX that doesn't know
\sys_ensure_backend:
this will work:or (requires a current lualatex-dev and is a bit experimental as it loads the new pdfmanagement)