This procedure writes a short text message within a box-shaped
area in a graphics window. The message may be split at word
boundaries into several lines, and the character size and
orientation may be adjusted for the text to fit within the box.
4 element vector specifying the box position and size
pos[0],pos[1] specify the lower left corner coordinate
pos[2],pos[3] specify the upper right corner coordinate
data window normalized coordinates are use
fg_color
color of box and legend titles (default=0)
bg_color
background color. Setting BG_COLOR erases the area
covered by the text box (filling it with color BG_COLOR)
prior to writing the text. If both BG_COLOR and !p.color
are zero then the background color is reset to 255 to
gaurantee a readability.
center
if set, center the text
right
if set, right justify text
box
activate to show the box on graphics window.
vert_space
default:1.5
vertical spacing of lines in units of character height