| Yorick I/O ReferenceGraphics Query, Edit, and Defaultsplq                  query (print) legends for current window 
plq, i               query properties of element i
 pledit, key_list     change properties of queried element
 pldefault, key_list  set default window and element
properties
 The keywords which regulate the appearance of graphical primitives include
(each has a help entry):
 legend     string to use for legend
hide       non-zero to skip element
 type       "solid", "dash", "dot", "dashdot", etc.
 width      line width, default 1.0
 color      "fg" (default), "red", "green", "blue", etc.
 marks, marker, mspace, mphase, msize  line markers
 rays, rspace, rphase, arroww, arrowl  line ray arrows
 closed, smooth   more line properties
 font, height, opaque, path, justify   text properties
 hollow, aspect   vector properties for plv
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