X Position Keyword
X switch alternative setting the X coordinate for text as well as graphics. When using the DMDX form (a keyword delimited by <> as opposed to the original DMTG form) N can either be an integer or a real number. If N is an integer it is a pixel value, if N is real it should be between 0.0 and 1.0 as it is multiplied by the width of the screen.
By default X determines the coordinate of the left of the displayed item, see <XYJustification>.