add_arrow

add_arrow 
-color s_color 
-p1 {x1 y1} 
-p2 {x2 y2}
[ -end1 arrow ] 
[ -end2 arrow ] 
[ -lineWidth width ]

The add_arrow command adds an arrow annotation to the active window.

`-color` s_color	Specifies the color for the arrow as the color name (such as `blue`) or the hexadecimal representation of the color preceded by a pound sign (#). A list of colors and their hexadecimal equivalents can be found on http://eies.njit.edu/~walsh/rgb.html.
`-end1 arrow`	Specifies whether the first endpoint has an arrowhead. If this argument is omitted, no arrowhead is added.
`-end2 arrow`	Specifies whether the second endpoint has an arrowhead. If this argument is omitted, no arrowhead is added.
`-lineWidth` i_width	Specifies the width in pixels of the line and arrowheads (if specified). Default: 1
`-p1` {f_x f_y}	Specifies the x- and y-coordinates for the first endpoint, as two space-delimited real numbers, enclosed in braces.
`-p2` {f_x f_y}	Specifies the x- and y-coordinates for the second endpoint, as two space-delimited real numbers, enclosed in braces.

The following example adds an arrow annotation, colored red, with an arrowhead at the second endpoint.

add_arrow -color red -lineWidth 2 -p1 {132.1 170} -p2 {134.5 171.2} -end2 arrow