What controls whether listing screenshots show two side-by-side vs one large in the new Chrome Web Store?

[Hugo Thomas]

Hi all,

On my extension's listing, the screenshots show as one large image at a time with a thumbnail strip and left/right arrows. But many other listings show two screenshots side by side at once. I want that side-by-side layout and can't work out what triggers it.

What I've already ruled out:

- Not the Featured badge. Non-featured extensions (e.g. Translation Comparison, Wooclap for Google Slides) show two side by side.

- Not the image size. I've used 1280×800 (and also 640×400), still single-large either way.

- Not the video. It was the same before I added a promo video, and some listings with a video still show two items side by side.

- I have multiple screenshots uploaded, not just one.

One thing I notice: my listing shows a "You might also like" sidebar on the right, while some of the side-by-side listings used the full page width. Could that sidebar / column width be the trigger? Or is it locale-related, viewport width, or something else?

So: what actually determines the two-up screenshot gallery vs the single-large carousel on the redesigned Chrome Web Store, and how do I get the side-by-side layout?

My listing for reference: https://chromewebstore.google.com/detail/screenplay-editor/cgnainjnmiaimmeephomhkhpcjahmfln

Thanks!