>>308736For most of 4chan's existence, when you make a thread or posted a reply you would by default be returned to the index. In order to override this behavior and remain in a thread after posting, one could enter 'noko' in the Email field (now the Options field). You could always spot newfags by posters complaining that they "lost their threads."
Anyway, moot changed this behavior a few years back due to a suggestion on /q/. Now the behavior previously enabled by 'noko' is default, meaning you remain in threads you reply to or create. You can however re-enable the old behavior if you wish by entering nonoko or nonokosage (same as nonoko, but it sages as well) in the Options field. I just tested it and it does still work, but only when using the original post form. It doesn't work with 4chan X's QR. Not sure about the inline extension QR.