Section: Handle-Based Graphics
boundingbox - four vector - The size of the bounding
 box containing the text (in pixels).  May contain negative values
 if the text is slanted.
 children - Not used.
 string - string - The text contained in the label.
 extent - Not used.
 horizontalalignment - {'left','center','right'} - Controls the 
 alignment of the text relative to the specified position point.
 position - three vector - The position of the label in axis
 coordinates.
 rotation - scalar - The rotation angle (in degrees) of the label.
 units - Not used.
 verticalalignment - {'top','bottom','middle'} - Controls the
 alignment fo the text relative to the specified position point in the
 vertical position.
 backgroundcolor - colorspec - The color used to fill in the background
 rectangle for the label.  Normally this is none.
 edgecolor - colorspec - The color used to draw the bounding rectangle
 for the label.  Normally this is none.
 linewidth - scalar - The width of the line used to draw the border.
 linestyle - {'-','--',':','-.','none'} - The style of the line used
 to draw the border.
 margin - scalar - The amount of spacing to place around the text as
 padding when drawing the rectangle.
 fontangle - {'normal','italic','oblique'} - The angle of the fonts used
 for the labels.
 fontsize - scalar - The size of fonts used for the text.
 fontunits - Not used.
 fontweight - {'normal','bold','light','demi'} - The weight of the font used
 for the label
 visible - {'on','off'} - Controls visibility of the the line.
 color - colorspec - The color of the text of the label.
 children - Not used.
 parent - The handle of the axis that owns this label.
 tag - string - A string that can be used to tag the object.
 type - string - Returns the string 'text'.
 userdata - array - Available to store any variable you
 want in the handle object.