To use these Ninja Materia Hunter posters and prints, just find a nice spot on your wall and hang them up. You can use nails or adhesive strips. When hanging, make sure the surface is clean and dry for better adhesion. As for maintenance, keep them away from direct sunlight to prevent fading. If they get a bit dusty, you can gently wipe them with a soft, dry cloth. Don't use any harsh chemicals or abrasive materials as they may damage the print. Enjoy your awesome ninja - themed art!