How to Make a Vertical Split Screen in Premiere Pro (Exact 50/50 Stack)

What "vertical split screen" means

In a vertical 9:16 frame — 1080×1920, the shape of Reels, TikTok, and Shorts — a split screen stacks two videos top and bottom, divided by a horizontal center line. You've seen it a thousand times: two-person interviews, podcast clips, reaction edits. It looks simple, which is part of the trap. The stacking is easy. The exactly even part is where editors go to age prematurely.

Method 1 — The manual way (Crop effect)

1. Create a vertical sequence. Go to Sequence Settings and set the frame size to 1080 × 1920.
2. Stack your clips. Top speaker on V2, bottom speaker on V1.
3. Crop the top clip. Select the V2 clip, go to Effect Controls → Crop, and set Bottom to about 50% so only the top half remains.
4. Crop the bottom clip. Select the V1 clip, apply Crop, and set Top to about 50%.
5. Frame each subject. Use Motion → Position (and Scale if needed) to slide each person into their half.
6. Check the seam. Zoom in at the middle. Uneven halves, gaps, or overlaps at the center line are the giveaway of a rushed split.

That's it — six steps. Except steps 5 and 6 aren't really steps; they're a lifestyle. That's where the time goes, even with guides on.

Why this is tedious

Here's the thing nobody tells you: the Crop effect has no idea what size your sequence is. None. You could tell it, but there's nowhere to type it. So "50%" is 50% of something — just not necessarily the thing you're looking at. If your source footage isn't the same aspect ratio as your timeline, the math quietly drifts.

Which is how a grown professional ends up at 11 PM, zoomed to 400%, nudging a podcast host one pixel at a time toward an imaginary line, forty times, for one episode. I know this because I was that professional. Multiply it across a full show and it's real hours lost — for a result that is still, technically, eyeballed.

Method 2 — The one-click way (VertForge)

VertForge is a Mac and Windows Premiere Pro plugin that reads your real sequence and clip dimensions and crops to an exact 50% split in one click — no guides, no math, no nudging. It also crops exact thirds for three-way stacks, and once you dial in a two- or three-clip stacked layout, it saves that framing as a look you can reapply to any clip in the edit — and swap between clips — in one click.

The three-clip stack — exact thirds

Everything above, but divided by three: three-person podcast panels, before/during/after comparisons, triple reaction stacks. The manual version means cropping the top clip to keep its top third, the middle clip to keep its middle third (cropping both top and bottom), the bottom clip to keep its bottom third — then positioning all three subjects and checking two seams instead of one.

And here's the extra catch: a third is 33.333…% — a number the Crop effect happily rounds. Your seams drift by a pixel each, and now there are two lines where it shows. If halves are fiddly, thirds are fiddly squared.

This is the newest thing VertForge does: it crops at an exact ⅓ the same way it crops at ½ — computed from your real sequence dimensions, both seams landing where they should — and its six look buttons cover one-, two-, and three-clip stacks, so a three-person layout gets saved once and reapplied across the edit like any other look.

Variations

• Three-clip vertical stack: covered above — the same idea in thirds, with two seams to keep honest.
• Side-by-side (horizontal video): the left/right version of the same idea, dividing a 16:9 frame down a vertical center line.

FAQ

Written by Sam — an editor who did the manual method more times than he'd like to admit, then built VertForge so he'd never have to again.