The elevator is a public place, and in order to ensure everyone's health and safety, smoking in the elevator is prohibited in many places.
So, how do you write a striking prompt?
First of all, we can use clear and concise language to tell people directly that you can't smoke in the elevator. For example: "Smoking is not allowed in the elevator, offenders are fined." "It's a simple way to tell you not to smoke. 
Second, we can also use some rhetorical devices to increase the appeal and effect of the prompt. For example: "The elevator is small space, and it is safe without smoke." This kind of prompting uses the rhetorical device of confrontation, which is impressive. 
In addition, we can also use some humorous language to spice up the prompts. For example: "The elevator does not smoke, healthy you, me and him." This kind of prompting uses a rhyming figure of speech, which is interesting and cautionary. 
Finally, we can also use some figurative ** or symbols to increase the visual effect of the prompt. For example, put a no-smoking sign on the elevator door, or put some posters about the dangers of smoking on the inside of the elevator. These ** or symbols can intuitively tell everyone not to smoke, and can also enhance everyone's awareness of the dangers of smoking.
In short, writing a good reminder about smoking in an elevator needs to consider language, rhetoric, visuals and other aspects, which should be concise and clear, but also attractive, interesting, and warning. Only in this way can we really play our due role and protect everyone's health and safety, don't you think?