void annotate(picture pic=currentpicture, string title, string text, pair position) { pic.add(new void(frame f, transform t) { position=t*position; label(f,"\special{!/pdfmark where {pop} {userdict /pdfmark /cleartomark load put} ifelse [/Rect["+(string) position.x+" 0 0 "+(string) position.y+"] /Subtype /Text /Name /Comment /Title ("+title+") /Contents ("+text+") /ANN pdfmark}"); },true); draw(pic,position,invisible); }