Hi! I raised this as an issue on Atom’s repo but it didn’t get much attention. I’ll quote myself from it:
Could it be possible to implement system window title bar/borders hiding like Chromium/Chrome has?
If you have used Chromium/Chrome you can notice it lacks the “system window title bar” by default (ie, the bar that says the name of the window and has the minimize, maximize and close buttons), while at the same time providing its own tiny minimize, maximize and close buttons in the top, rightmost part of the window.
Some window managers for Linux let you hide the window title bar, but since Atom lacks its own minimize/maximize/close buttons, it becomes inconvenient. Besides, it would be something nice to have in Windows/OSX too.
IMHO, this feature manages to save (precious!) vertical space, and looks much more pleasant.
Here is the link to the issue https://github.com/atom/atom/issues/4599
Its one of the features that pretty much sold Chrome/Chromium to me years ago, and as I commented in the issue, it might be one of those things that you didn’t know you wanted until you have it.