I did not find anything to save the custom settings. Not only is this problem, but there is also a problem that when I press the Replay button, the "Return to this topic" option must be enabled. So stay in the same thread, otherwise the page will automatically move to the main board.About the Reply (not Replay) button, you can customize your Profile settings and turn it on.
I think admins should make some changes or at least enable users to customize the settings that suit them.
https://www.altcoinstalks.com/index.php?action=profile;area=theme;u=97261