iMovie Edit
1.1 How to Add Subtitles in iMovie
1.2 Add Music in iMovie
1.3 iMovie Effect
1.4 iMovie Green Screen
1.5 iMovie Trailers
1.6 iMovie Picture in Picture
1.7 iMovie Slow Motion
1.8 How to Rotate Video in iMovie
1.9 iMovie Split Screen
1.10 How to Add Transitions in iMovie
1.11 iMovie Time Lapse
1.12 iMovie Stop Motion
1.13 iMovie Split Clip
1.14 How to Crop Videos on iMovie
1.15 How to Do a Voiceover on iMovie
1.16 iMovie Aspect Ratio
1.17 How to Fast Forward in iMovie
1.18 Zoom in/out on iMovie
1.19 iMovie Stabilization
1.20 iMovie Fade Audio
1.21 How to Reverse Video in iMovie
1.22 How to Join Clips in iMovie
1.23 Trim Auido in iMovie

[Updated] How to Change Aspect Ratio in iMovie on Mac/iPhone/iPad

iMovie Apsect Ratio

Aspect ratio is very important to your video, it defines the movie dimensions, in other words, how it is going to look like on the video players while playing. Therefore, depending on where you are going to use the video, you will have to choose the right aspect ratio that best suits for it.

If you use iMovie to edit your videos, you'll be asked to set an aspect ratio when you create a new project, but you can change the aspect ratio at any time before you export. In this article, we will introduce to you how to set or change aspect ratio in iMovie on Mac/iPhone/iPad.

Part 1. How to change aspect ratio in iMovie on Mac

It takes only a few steps to change iMovie aspect ratio in old versions, but I'm not very sure from which version this function was deleted. If you know that, you can share with us in comments below. We will show you how to change aspect ratio in old iMovie versions and how to change video size in new version.

1. How to change aspect ratio in old iMovie?

Step 1. Open iMovie app. Click to select a project in the Project Library, or import a project so that it's showing in the Project browser, then choose "File" > "Project Properties".

Project Properties

Step 2. You should now see the properties dialog box on your screen that has all the information about your current project. To change the aspect ratio of your project, you need to choose an aspect ratio option from the Aspect Ratio dropdown menu. Basically, there are two aspect rations in iMovie:

Widescreen (16:9): Widescreen movie appears wider and is optimized for viewing on widescreen computer monitors and high-definition TVs (HDTVs).
Standard (4:3): Standard movie looks more square, and it is designed for standard-definition TV.

Choose Aspect Ratio

Note: When you change the aspect ratio, iMovie may zoom in or crop the video a bit so that the video fills the screen without letterboxing (adding black bands to the top and bottom of the video) or pillarboxing (adding black areas to the sides of the video).

2. How to change video size in new iMovie?

I'm using iMovie 10.1.9. The aspect ratio is fixed to 16:9, and there's no entry to change it. But you can still change video size. Here are detailed steps.

Step 1. Import video into iMovie.

Import Video to iMovie

Step 2. Drag it to the timeline below. Clip Cropping – Crop to Fill. Then you can drag the corner of the cropping tool to change the video size.

Crop Video in iMovie

Step 3. After you set the cropping area, make sure that's what you want, click Apply crop adjustment. Then you will get cropped video.

Actually, iMovie is very powerful in other editing features. For now, aspect ratio is the only shortcoming. If you have great demand of changing aspect ratio, you can try another editing tool in the following part.

Part 2. Better way to set or change aspect ratio

Apart from iMovie, there are also better ways to set or change aspect ratio. Here we would like to recommend you another professional and free video editor. You can use it to change aspect ratio quickly on Windows/Mac.

Free Video Editor Free Video Editor
  • All aspect ratio parameters are provided. You can choose 4:3, 16:9 or set it to non-standard ratio as you like.
  • Powerful editing functions are provided, such as adjusting video brightness/hue/saturation/contrast, rotate and flip the video, enhance video quality, remove video noise, stabilize shaky videos, add watermark, etc.
  • Convert any video/audio to MP4, MOV, AVI, MKV, MP3, FLAC, and other video/audio formats you need.
  • Rotate and flip the video to the right angle.
  • Cut a video into clips and merge clips into one.
  • Enhance vide – upscale resolution, optimize brightness/contrast, remove video noise, and reduce video shaking.
  • It has Windows version and Mac version.

How to change aspect ratio with Free Video Editor?

Step 1. Download and install Free Video Editor.

Free Video Editor

Step 2. From the main interface, choose Crop. Click Add File and load the video you want to edit.

Add Files

Step 3. If you want to change aspect ratio, uncheck Keep Aspect Ratio, then choose 4:3 or drag the cropping area, or input the area size by yourself.

Change Aspect Ratio

Step 4.Choose the output format. After done, click Save. And the program will start converting.

Step 5.Wait for a few seconds and the cropped video will be saved. Click Open Output Folder and you will find the video you want.

Open Folder

As to the cropping feature, this Free Video Editor is better than iMovie. You cannot change, but also set the parameter by yourself. From the preview window on the right, you can quickly define the output effect. If you don't want the black edges, you can choose another Zoom mode.

Part 3. How to change aspect ratio in iMovie on iPad/iPhone

The function of changing aspect ratio in iMovie on iPhone/iPad lies somewhere sheltered. Many users cannot find the entry. You can follow the picture guide below. Only 2 steps you can find it. First, tap the timeline below and check it. Then tap the zoom icon on the right top corner. Now you can zoom in or zoom out with two fingers, just as you preview a photo. Click Done and the video will have been cropped. This is the only way you can change the aspect ratio on iPhone. If you need more convenient way, I recommend you try Free Video Editor in Part 2.

Change Aspect Ratio in iMovie on iPhone

For iMovie tutorial on computer, you can check the video tutorial down below:

In this article, we have mainly taught you how to set or change aspect ratio in iMovie. Still have more questions about iMovie aspect ratio? You can leave your comments down below.

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November 13, 2018 11:24 / Updated by to Video Editing, iMovie