\var{border_style} & A string indicating the style of border; one of
elevated/inlaid/ridge/groove as seen in the
above sketch. \\
+\var{border_sides} & A string indicating which sides of the border
+ to draw: all/tb/lr for all, top and bottom, and
+ left and right. To control between left/right
+ and top/bottom, use the pixel options below. \\
\var{highlight_pixels} &
Width of the highlight part of the border in pixels. \\
\var{shadow_pixels} &