[XeTeX] XeTeX PDF-1.7 in TeX Live 2025

[Max Chen]

Hi all,

"Generate PDF-1.7 by default in all formats, both plain and LaTeX;
before, it was 1.5." see https://tug.org/texlive/bugs.html

However, it is still 1.5 by XeTeX.

Following https://tex.stackexchange.com/q/536254, I add the following
line to the preamble

\special{pdf:minorversion 7} %set minorversion

it produce PDF-1.7

The "XeTeX: \special{pdf:majorversion:1}\special{pdf:minorversion:4}"
mentioned in https://tug.org/texlive/bugs.html, may have typos, i.e.,
the second colon should be replaced by a blank space.


Best regards

Chen