Can Auto Reframe make stacked vertical layouts?

No. Auto Reframe tracks a single subject inside one clip. A stacked layout is two or three separate clips sharing the 9:16 frame, so each clip needs its own crop, scale, and position. Auto Reframe has no concept of a stack.

What scale fills a vertical frame with a 1080p clip?

About 178% (1920 divided by 1080) fills a 1080x1920 sequence top to bottom with a 1920x1080 clip. For a stack you then crop each clip to its half or third of the frame.

Why do my crop percentages not match between clips?

The Crop effect in Premiere Pro is measured as a percentage of the source clip, not the sequence. Two clips at different scales need different crop numbers to land on the same line, which is why copying crop values between clips usually misses the seam.

Adobe Premiere Pro tutorial

How to stack clips vertically in Premiere Pro (double and triple stacks)

Stacked layouts are the backbone of short-form editing: two or three clips sharing one 9:16 frame, seams landing clean on the halves or thirds. TikTok, Reels, and Shorts feeds are full of them. Here is the manual way to build one, honestly and completely, and then the one-click way.

Method 1: the manual way (guides and crop)

This is the standard approach you will find in most tutorials. It works. It is also the part of vertical editing that eats the most time, which is worth knowing before you commit a whole podcast season to it.

Set up a vertical sequence. 1080x1920, same frame rate as your footage.
Turn on guides. Drag a horizontal guide to the 50% line for a double stack, or to 33.3% and 66.6% for a triple. (View menu, or drag from the ruler.)
Stack your clips on V1 and V2 (and V3 for a triple).
Scale each clip to fill. A 1920x1080 clip needs roughly 178% scale to fill the vertical frame top to bottom. Then drag Position so the subject sits inside its half or third.
Crop each clip to its zone. Effects, Crop: crop the bottom of the top clip and the top of the bottom clip until the edges meet your guide.
Nudge until the seam looks right. This is the eyeball step, and it is where the time goes.

Why the numbers never transfer: The Crop effect in Premiere Pro is measured as a percentage of the source clip, not the sequence. Two clips at different scales need different crop values to land on the same line. Copy-pasting crop numbers between clips almost always misses the seam, which is why every clip becomes its own fiddling session.

Multiply that by every clip in a 40-clip week, and add one more catch: if you rebuild the layout next episode, you start from zero. And if your source is a multicam sequence, angle changes can knock the framing you just built out from under you.

What about Auto Reframe?

Auto Reframe is good at what it does: tracking a single subject inside one clip. But a stack is not one clip, it is two or three clips sharing the frame, each with its own crop, scale, and position. Auto Reframe has no concept of a stack, so for this layout it does not help.

Method 2: the one-click way

This is the part where I disclose that I built the tool: VertForge is a Premiere Pro panel made specifically for stacked vertical work.

Exact crops in one click. It computes a true ½ or ⅓ crop from your actual sequence and clip dimensions, so the seam lands on the line every time. No guides, no math, no eyeballing.
Save the layout once, reapply forever. Dial in a framing you like, save it as a look, and apply it to any clip in one click. Six look slots cover single, double, and triple stacks.
Swap framings between stacked clips in one click when you want the bottom speaker on top.
Multicam survives. VertForge writes multicam angle changes through its local engine, so your stack and your angle switching stay in sync.

Free 7-day trial, then $20. Once. No subscription, ever.

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Which method should you use?

If you build a stack once in a while, the manual method is fine, and now you have the full recipe above. If stacks are your daily work, the math is simple: the manual method costs a few minutes per clip forever, and the panel costs $20 once. Try the manual method first if you like. That is the honest way to find out what your time is worth.