The origin is on the left of the first character, on the baseline. This
method allows to place a string precisely on the page, but it is
usually easier to use {@link cell()}, {@link multiCell()} or {@link write()} which are the standard methods to print text.
All coordinates can be negative to provide values from the right or
bottom edge of the page (since File_Pdf 0.2.0, Horde 3.2).