Editing a long post seems to be very painful. This could even prevent many - at least users who are new to the editor - not to edit anything complex anymore.

  1. You need to double scroll - scroll between source and result pane, and scroll inside source pane. Why not use left-right layout?

  2. Why not provide a source-result synchronization feature? Which means, whenever you click somewhere in the source or result pane, the other is auto scrolled (need left-right layout to do this) and the corresponding place is high lighted.

  • Who's going to pay for the development of these features?
    – muru
    Commented Nov 10, 2023 at 0:53
  • 1
    There's actually an active project that SE is working on to revamp the whole editor. You can enable it on your meta.se account and try it in the sandbox question. They do not offer a side-by-side preview, but they offer editing of rich-text format directly. I haven't followed up on the news about it, but it's still in active development and open-source on GitHub.
    – Dan
    Commented Nov 10, 2023 at 9:20

1 Answer 1


The simple answer is "nobody wrote code to do that for SE".

However, if that's something you'd like or would find useful, you could use an IDE such as Visual Studio Code that supports that functionality. Some online IDEs, including stackedit.io also support that feature. You could compose your question (or answer) in one of those, and then copy-paste it into the Stack Exchange question/answer box once you're happy with it.

It's probably possible to write a userscript that does that, but... using an existing tool, like one of those, isn't hard, so it's somewhat unlikely someone will write a userscript for that. Still, you could try to do that if you really wanted.

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