在Github Atom Editor中，分隔代码的行是什么？

Question

There is a transparent thin line two-thirds of the window page in Github Atom-Editor, primarily more on the right side of Atom. I am wondering what is the purpose of that line, whether it has any significance or it has different kinds of usage.

Answer 1

Without seeing a screen shot I cannot be sure, but I am reasonably certain you are referring to the "preferredLineLength" marker. It is a line that shows where the end of a line would be if it were within the bounds of the preferredLineLength

https://flight-manual.atom.io/using-atom/sections/basic-customization/