Vertical scroll
Vertical scroll is a comic format laid out as one tall, continuous column read by scrolling down a phone screen instead of turning pages. It is the standard format for webtoons, where empty space between panels sets the pacing.
One column, one direction
A print page is composed as a whole: the reader takes in the layout before reading any single panel, which is what allows irregular grids, diagonal reading orders and double-page spreads. None of that survives a phone. In vertical scroll the reader sees roughly one panel at a time, in a fixed order, and cannot see what is coming. Every craft difference follows from that.
The canvas and the numbers
The working standard is 800 px wide artwork, usually drawn at 1600 px and downscaled, with height essentially unlimited. Platforms take the episode as a stack of image slices — commonly 800 × 1280 px, and most hosts reject single images taller than about 2000 px or larger than a few megabytes. Slice on a gutter, never through a face or a bubble: the seam between slices can show as a hairline on some devices.
Assume a viewport roughly 800 × 1400 px tall. That is your real frame, and it is the thing to check a layout against before anything else.
Panels are wide, not tall
A panel taller than the viewport gets cut in half by the screen and the reader never sees it whole. Most webtoon panels are therefore wider than they are tall. When you genuinely need height — a tower, a fall, a full-body reveal — that is a deliberate effect: the reader scrolls through the image, discovering it in strips, and it should be used for the shot that earns that treatment.
Empty space is the pacing tool
In print a gutter is a few millimetres. Here it is screens. A reveal is set up by leaving 600–1500 px of flat colour or texture before it, so the reader scrolls through nothing, and the nothing is the tension. Comedy works the same way in miniature: a short gap, then the punchline panel alone on an otherwise empty screen.
Two rules that follow:
- Never put a payoff directly under its setup. They will be on screen together and the surprise is gone before it is read.
- End an episode with the cliffhanger panel isolated, preceded by a long gap. That last screen is what decides whether anyone comes back next week.
What it costs you
You lose the page turn, the double-page spread, and layout as composition. You also lose the ability to let a reader’s eye wander — reading order is now absolute. In exchange you get precise control over timing, which is why the format suits melodrama, slow reveals and cliffhangers, and why it feels wrong for dense ensemble scenes with six people talking.
Related terms
- Webtoon A webtoon is a digital comic drawn as one continuous vertical strip, meant to be read by scrolling down a phone screen rather than turning pages. The format began in South Korea and is now used worldwide.
- Gutter A gutter is the empty space between two comic panels. The reader fills it in, imagining whatever happened between the two images, so the width of a gutter controls how much time the story skips and how long a beat is held.
- Panel A panel is a single framed image in a comic that shows one moment of the story. Its border marks where that moment ends, its size controls how long the reader spends there, and the sequence of panels is the sequence of time.
- Manhwa Manhwa is the Korean word for comics. In English it usually means a South Korean comic, most often a full-colour vertical-scroll webtoon, as distinct from Japanese manga or Chinese manhua.