How to Change a Reels Cover (2026) — Picking It Before You Post, What to Do When You Can't Edit It After, and Cover Size & Ratio

You post a reel, open your profile, and the cover is an awkward mid-motion frame — or the title you carefully designed is cropped off at the top and bottom. So you search "change reels cover" or "can't edit Instagram reel cover," and most results turn out to be editing-app promos that never say where to tap in Instagram or why it isn't working. This post uses Instagram's Help Center as the source of truth to cover the order for picking a cover before you post, the problem of changing it after posting, and Reels cover size and aspect ratio, plus what to know when you set a cover in a scheduling tool.

Before you read: Instagram behavior here is based on the Help Center pages Record a reel on Instagram and Reel size & aspect ratios on Instagram, and Meta's developer reference IG Media (checked 2026-10). App screens can differ slightly between versions. This post is written by the UUP team, which builds scheduled Instagram Reels posting (auto-upload).

1. Picking a cover before you post — a frame from the video vs. a camera-roll photo

The safest moment to set the cover is the screen right before you share. Here is the path the Help Center gives (per the Help Center).

The difference between the two:

• A frame from the video: nothing extra to prepare. But because it's moving footage, it's easy to land on a blurry or eyes-closed frame, and you can't add text.
• A camera-roll (computer) photo: you can design a separate cover with a title on it. Useful for series where you want your profile to share one look. The Help Center lists the cover file formats as PNG and JPG.
• Pick as if you can't change it later. As the next section shows, the official docs say editing the cover after posting isn't supported. If you haven't decided yet, don't post right away — save it as a draft, settle the cover, then share.

2. Changing the cover after posting — the official answer is "no"

Instagram's Help Center page on Reels specs says this under the cover section: "Right now, you can't edit your cover photo after you've uploaded it." — in other words, the cover can't be edited once the reel is uploaded (checked 2026-10; the same sentence appears in the app, Android, and desktop versions of the page).

Public sources (user write-ups and how-to posts) also describe a cover option appearing under ⋯ → Edit on a published reel (example). That conflicts with the official docs, so there's no basis for assuming it works on every account. In short:

• If you see a cover option on the Edit screen, your account and app can change it — go ahead.
• If you don't, that's exactly the state the Help Center describes. There's no official basis that reinstalling the app or switching account type will help.
• The one reliable route then is deleting the reel and reposting it with the cover you want. A repost is a new post, so existing likes, comments, and views don't carry over — if the reel already has traction, it's better to leave the cover as is.
• Captions are different. The Help Center says you can edit the caption of a post you've already shared under ⋯ → Edit (edit caption). Don't treat the cover and the caption the same way.

The same goes for outside tools. In the Instagram API, the request that changes already-published media (POST /<IG_MEDIA_ID>) accepts only turning comments on or off (`comment_enabled`) (IG Media "Updating", checked 2026-10). The cover (cover_url) can only be passed at the moment the reel is created. So no scheduling tool can change a cover through the API after posting.

3. Reels cover size & ratio — make it 9:16, keep the key parts in the middle 3:4

Cover size is confusing because the cover is cropped differently in each place it shows up.

On January 17, 2025, Instagram head Adam Mosseri announced profile grids would show rectangles instead of squares, and it rolled out that weekend (PetaPixel report). We couldn't find a Meta document that publishes the exact ratio; public sources measure it as 3:4 — and it may change. Put a 9:16 cover into a 3:4 tile and the top and bottom get cut off.

In practice, this works well almost everywhere:

• Make the canvas 1080×1920 (9:16). That fills the playback screen.
• Keep title text and faces inside the middle 1080×1440 (3:4). That's the area the profile grid won't crop.
• Put only expendable background in the top and bottom margins. Even on the playback screen, the edges are where the account name, caption, and buttons tend to overlap.

Reels length and file size limits are covered separately in Reels length limits.

4. Setting a cover in a scheduling tool — how UUP auto-upload handles it

If you prepare reels ahead and post them at a set time, the cover has to be set when you schedule. As section 2 showed, it can't be changed through the API after posting. Here is how UUP auto-upload works.

• Dashboard → Auto-upload → Create a post → choose the Video type and select Instagram, and it posts as a reel. Sharing to feed is always on, so it also appears on your profile grid (there's no option to turn it off).
• Under the video, use Choose a cover in the Cover image (optional) field to upload an image. If you leave it empty, the screen notes that "the platform picks a frame from the video." There's no feature to pick a specific frame from the video — if you want a particular scene, screenshot it and upload it as an image.
• Instagram Reels covers accept JPEG only. So if you upload a PNG, the screen converts it to JPG before uploading, and other formats (WebP, GIF, etc.) are rejected with "Covers must be a JPG or PNG image."
• You can't set a cover on a video placed inside the Multi-photo type. Instagram's cover setting is reels-only, so putting a video into a multi-photo set removes the cover field.
• UUP doesn't change covers after posting either. Setting it before scheduling is as far as it goes.

When you schedule the same video to other channels too, cover support differs by channel.

Auto-upload is available on Upload Pro ($8.49/month) · Ultra ($14.99/month, includes Auto DM) · the 14-day trial that starts on sign-up (no card required). It isn't included in DM Pro.

5. A checklist so you don't have to repost over a cover

• Save your cover image separately: a cover with text reads more clearly on your profile than a video frame, and it's ready if you ever have to repost.
• Check that the key parts sit inside the middle 3:4: cropping the 9:16 cover to 3:4 on your phone gives a rough preview of the grid.
• Look at the cover screen once more before sharing: work on the assumption that you officially can't change it afterward.
• When in doubt, save a draft: share after you've settled the cover.
• If you schedule, include the cover when scheduling: UUP auto-upload doesn't change covers after posting.

Frequently asked questions

Can I change a reel's cover after posting?

Instagram's Help Center says "Right now, you can't edit your cover photo after you've uploaded it" (checked 2026-10). If your account shows a cover option on the post's Edit screen, change it there; if not, deleting and reposting is the only way.

What size should a Reels cover be?

Make it 1080×1920 (9:16) and keep text and faces in the middle 3:4 area — that's a safe default. The Help Center's recommended cover size is 420×654px (1:1.55), and since January 2025 the profile grid crops to a vertical rectangle.

Can I change the cover of a reel I scheduled later?

The API can't change the cover of a published reel. UUP auto-upload also stops at setting it when you schedule. After posting, follow the Instagram app steps above.

See also

• How to schedule Instagram Reels — the app's built-in scheduling vs. auto-upload tools, and how far each goes
• Reels length limits explained — why 3, 15, and 20 minutes don't line up, plus size and ratio
• How to cross-post Reels, Shorts, and TikTok — what changes per channel (length, cover, title, first comment)

To schedule reels with the cover already set, start free and the 14-day trial opens. Channel-by-channel details are on Features.