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by jrmoran 4121 days ago
is that last screenshot intellij? If that's the case, the editor supports splitting windows https://www.jetbrains.com/idea/help/splitting-and-unsplittin...
1 comments

Which is why I'd assume TFA is talking about something similar to Emacs's follow-mode[0], not mere vertical splits

[0] https://news.ycombinator.com/item?id=2797790