Thank you Ingo, http://man.openbsd.org/ works great for me too now.
------ I've found some more OpenBSD web pages that could benefit from readable text on phone devices: - httpd, all directory listings. sample: http://ftp.openbsd.org/pub/OpenBSD/6.3/i386/ - cvsweb, all pages: https://cvsweb.openbsd.org/cgi-bin/cvsweb/ - iked project pages: http://www.openiked.org/goals.html http://www.openiked.org/manual.html http://www.openiked.org/papers.html http://www.openiked.org/users.html http://www.openiked.org/security.html ------ screenshots (original | viewport): https://viewports.github.io/httpd-cvsweb-iked.html info about viewport: https://marc.info/?l=openbsd-misc&m=152665457925541&w=2