Okular scale PDF document when printing which means 1 cm is shorter by a factor 96.6 % in my case. This is a major issue when dimensions must be accurate. Why printing with okular is not equivalent to the lpr command ?
can you give a sample document, and mention what paper size(s) you're using (both in document and printer)?
Created attachment 103655 [details] Print pattern
OK, as far as I can tell, that attached pdf is uses papersize: 8.26772 x 11.6929 in (Portrait A4) Can we assume the printer uses A4-sized paper too?
Document is a4 and I use the "default properties" which are actually set to A4 and margins set to top 4.94, left/right 6.35, bottom 5.29 mm. I don't understand what is the purpose of theses margins since I want to send the PDF as is to my printer. Does Okular try to fix document with too short margins for a printer? Note acroread provides much advanced scaling printing settings: None, Fit to printable area, Shrink to printable area etc.
Yes Cups Printer is set to default: media=iso_a4_210x297mm
I suggest to add a "Fit to print area" option, like other PDF viewers have (e.g., Foxit and Adobe Reader), because shrinking/scaling should be optional.
Let's mark this as a duplicate of https://bugs.kde.org/show_bug.cgi?id=348172, since once that's fixed, this will be, too. *** This bug has been marked as a duplicate of bug 348172 ***