How to fix the large poster light box on the wall depends on the situation. Generally, expansion bolts and welded steel frames are used for fixing. Our company has 18 experience in making outdoor advertising light boxes. If you want to do it, you can find out how to fix the large poster light box on the wall to make an outer wall steel frame, otherwise it may not be fixed. Honey decoration construction team can do indoor construction, poster light box can also do it. Where are you? Design photo albums with PS, and use rgb or cmyk for posters and light boxes. If you use color inkjet printing, it is recommended not to convert to CMYK. Now the printer also supports RGB printing, so the printing effect will be better. In the process of converting rgb to cmyk, it is also necessary to manage the color of the printer. If you must convert, you should ask the printing company for the ppd color file of the printer, install it on the computer, and then convert it.