TextAlignment defines how the text string is displaced from the origin. The specific choices for the horizontal and vertical alignment are defined in the HorizontalText and VerticalText enumerations. If the continuousHorizontal or continuousVertical options are chosen, the user can provide an offset from the origin in the last two attributes. The offsets must be in the spatialReferencing coordinate system and they must be relative to the text origin at (0,0).