How do you build a CRT monitor?

no idea. people don't use CRT monitors anymore if they don't have to. What I would do is just build any old monitor you'd see today, but just put more room in back for the mechanisms. other then that, I don't know. people destroy CRT monitors or make them into cages for pets or fish tanks, toy boxes, storage, emergency monitors, and much more. If you can ( I'm not an expert at this website,) tell me more things people use CRT monitors for. one last thing, People also get newer monitors and destroy CRT monitors.