Emacs: Make Screen Flow Side-by-Side for Widescreen

you can set emacs to display a file side-by-side, with left bottom continue to right top. When cursor moves to the bottom of left pane, it'll appear on the right top.

This is most useful if you have wide screen.

Alt+x split-window-horizontally. Then, Alt+x follow-mode.

You can use mouse to scroll. It'll scroll both panes, but the mouse pointer must be on the pane the cursor is on.

To stop the text flowing behavior, Alt+x follow-mode again to toggle.

Thanks to Zhang Tianjin for mentioning this tip.