I used to put an invisible frame around figures in MetaPost by setting a pen
scaled at 0pt. That left no trace, but defined the area.
However I (now) see a thin line drawn by code:
pickup pencircle scaled 0pt;
draw origin--(w,h);
Did I always mis this or has something changed? For example a roundoff away
from zero in MetaPost?
By the way I am typesetting through ConTeXT with \startMPpage … \stopMPpage.
Hans van der Meer
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