To use these Mega Doom posters and prints, simply pick a nice spot on your wall, peel off the backing if it's a sticker - style print or use a frame for the poster. Hang it up with nails or adhesive strips. Make sure the surface is clean and dry for better adhesion. When it comes to maintenance, avoid direct sunlight for long periods as it may fade the colors. You can gently dust the prints with a soft cloth if they get dirty. And always handle them carefully to prevent any tears or creases.