[en] This manual provides the technical information that a FORTRAN programmer needs to write graphics computer programs. The purpose of this graphics package is to provide an internally consistent, easy-to-use set of graphic subprograms for making publication style plots and illustrations on a variety of display devices. The descriptions in this chapter give an introduction to simple plotting. The intent has been to present an overview in the hope that, with an idea of what is going on, more general methods will be easier to learn