Scroll by Column

Left: A⃣ B⃣ H⃣
Right: D⃣ F⃣ L⃣

(as in WASD, back/forward, or vi)

Add ⇧ Shift to scroll to the start of the column instead of always scrolling by one column width (even if the scroll area starts halfway through).

You might have to click in the content area to get it to focus. (If the browser's built-in left/right arrow keys work, but this demo's custom ones don't, let me know!)