Graphiques: export et impression

• driver — select a graphics driver
• xend — termine la session graphique courante
• xinit — Initialisation d'un pilote graphique
• xs2bmp — export graphics to BMP
• xs2emf — export graphics to EMF.
• xs2eps — export graphics to EPS
• xs2gif — export graphics to GIF
• xs2jpg — export graphics to JPG
• xs2pdf — export graphics to PDF.
• xs2png — export graphics to PNG
• xs2ppm — export graphics to PPM
• xs2ps — export graphics to PS
• xs2svg — export graphics to SVG