Separator in atom editor?

Question

atom

I would like to know why the separator is needed in the atom editor and whether it can be removed, otherwise it is a little annoying

Answer 1

Shows where 80 characters end. The displays are already large, but the historically established standard has not gone away :-) A number of recommendations for code design say that the length of the line should not exceed 80 characters, and this line shows when the time has come to make a line break.
By the way, the mail client also formats the text of the letter (if it is not HTML) at 80 characters per line.
How to remove? To be honest, I don't know, and I don't recommend it.