larrows(x0, y0, x1, y1, proportion, ...)
llines(x, y, ...)
lplot.xy(xy, ...)
lpoints(x, ...)
lsegments(x0, y0, x1, y1, ...)
lsegments(x1, y1, x2, y2, ...)
ltext(x, ...)
panel.arrows(...)
panel.lines(...)
panel.points(...)
panel.segments(...)
panel.text(...)arrowsalpha between 0 and 1 can be supplied. Be
    careful with this, since for devpanel.* are
  essentally identical to the l* versions, are recommended for
  use in new code (as opposed to ported code) as they have more readable
  names.  See the documentation of the base functions for usage. Not all
  arguments are always supported. All these correspond to the default
  methods only. For ltext, only values 0, .5 and 1 for adj
  have any effect.
points, lines,
  text, segments,
  Lattice