What my screen looks like:
(lines with arrowheads+print widths applied, plus leaders with sized arrows)
What the print preview looks like (Rhino PDF)
What the PDF looks like!
It looks like the arrowheads are obeying the printwidth setting, not the print dialog setting.
And what’s going on with the PDF???
arrows.3dm (328.4 KB)
arrows.pdf (27.9 KB)