Where to Find the Aspect Ratio Setting in CapCut

Open your project in CapCut and tap the Canvas button at the bottom of the screen. This opens a menu showing your current aspect ratio — it will display as a ratio like 9:16, 16:9, 1:1, or 4:3, depending on what you chose when you created the project. Tap the ratio itself to see all available options.

CapCut will show you preset ratios grouped by use: vertical formats (9:16 for TikTok and Instagram Reels), horizontal formats (16:9 for YouTube), and square (1:1). You can also enter a custom ratio by tapping Custom and typing your own numbers. Once you select a new ratio, CapCut applies it when ready to your timeline.

Key Takeaways

  • The Canvas button at the bottom of the CapCut editor opens the aspect ratio menu, where you can switch between presets or create a custom ratio.
  • Changing the aspect ratio after you have added clips will add black bars (letterboxing or pillarboxing) around your content rather than cropping it.
  • CapCut offers preset ratios for common platforms: 9:16 for vertical video, 16:9 for horizontal, and 1:1 for square.
  • If you want to fill the entire new frame without black bars, you will need to manually zoom or reposition each clip after changing the ratio.

What Happens to Your Clips When You Change the Ratio

When you change the aspect ratio of an existing project, CapCut does not crop your clips. Instead, it adds black bars on the sides or top and bottom to fit your content into the new frame size. If you switch from 16:9 (wide) to 9:16 (tall), you will see black bars on the left and right. If you go from 9:16 to 16:9, the bars appear top and bottom.

This is usually what you want if you are repurposing the same video for different platforms. However, if you want the video to fill the entire new frame without black bars, you will need to zoom in or reposition each clip manually. Select a clip, tap the Scale option in the editing panel, and drag the slider to enlarge it until it fills the frame.

Changing Ratio Before You Start Editing

The easiest time to set your aspect ratio is when you first create a new project. When you tap New Project, CapCut shows you ratio options before you import any clips. Choose the ratio that matches where you plan to post the video — 9:16 for TikTok or Instagram Reels, 16:9 for YouTube, 1:1 for Instagram Feed posts.

If you set the ratio correctly at the start, your clips will already be framed for that format, and you will not have to zoom or reposition them later. This saves time and means you are less likely to accidentally crop out important parts of the frame.

Custom Aspect Ratios and When to Use Them

CapCut lets you enter any ratio you want by tapping Custom in the Canvas menu. You type two numbers separated by a colon — for example, 3:2 or 5:4. This is useful if you are creating content for a platform or device that does not match the standard presets, or if you have a specific creative vision for the frame shape.

Keep in mind that unusual ratios may add more black bars when you export, depending on where you upload the video. Most social platforms and video players expect one of the common ratios (9:16, 16:9, 1:1, or 4:3), so a custom ratio might not display the way you intended on every device.

Exporting Your Video After Changing the Aspect Ratio

Once you have set your aspect ratio and finished editing, tap Export to save the video. CapCut will render the video in the ratio you chose, including any black bars. The file size and resolution depend on the ratio and the export quality you select — CapCut usually defaults to 1080p, which is fine for most social platforms.

If you want to export the same project in multiple aspect ratios (for example, both 9:16 and 16:9), you do not have to edit the whole thing twice. Change the Canvas ratio, make any zoom or positioning adjustments needed, export, then change the ratio again and export a second time. CapCut saves your edits separately from the aspect ratio setting.

Fixing Black Bars by Zooming or Repositioning Clips

If you changed the aspect ratio and now see black bars, you can remove them by scaling up your clips. Select each clip in the timeline, tap Scale, and drag the slider to the right until the clip fills the frame. You may need to reposition the clip afterward by dragging it so the important part of the image is centered.

Another option is to use the Fit button, which automatically scales the clip to fill the frame while keeping the same aspect ratio — though this may crop the edges slightly. Test both methods on a short clip first to see which one preserves the part of the image you care about most.

Frequently Asked Questions

Can I change the aspect ratio in the middle of editing?

Yes. Open Canvas at any point and select a new ratio. Your clips will stay in place with black bars added around them. You can then zoom or reposition individual clips to fill the new frame if you want.

What aspect ratio should I use for TikTok?

TikTok works best with 9:16 (vertical). CapCut includes this as a preset. Videos in other ratios will display with black bars on the sides.

Does changing the aspect ratio affect video quality?

No. The quality of your video depends on the resolution you export at, not the aspect ratio. Changing the ratio just changes the shape of the frame.

What if I want to crop instead of add black bars?

CapCut does not have a built-in crop-on-ratio-change feature. Instead, manually zoom each clip using the Scale slider until it fills the frame. This crops the edges while keeping the center in focus.

Can I save different aspect ratios of the same project?

Yes. Change the Canvas ratio, adjust clips as needed, export the video, then change the ratio again and export a second time. CapCut keeps your edits intact across ratio changes.