Home / Help / Edit a recording Edit a recording
Change a video to vertical 9:16 for TikTok, Reels and Shorts Set the canvas to Reel, Square, Portrait or another size. A screen recording is cropped to match and can follow your mouse.
Where to find it Editor → Canvas (above the preview) → Size & shape
How to do it 1 Press Canvas at the top of the preview, or click the preview outside every clip.
2 In Size & shape on the Edit tab, choose Reel (1080×1920), Square , Portrait , Landscape or Cinema .
3 To type a size, enter the width and height beside Size , or pick one such as 2160 × 3840 · 4K Reel from the sizes menu next to them.
4 Choose a Motion for the recording, such as Follow mouse , so the crop stays on the action.
Good to know The canvas applies to the whole timeline. Full frame goes back to the recording’s own size. You can also drag the canvas’s edges in the preview to resize it. Everything on it keeps its size and place.
Who can use it Free
Where it works Mac · iPhone · Web This guide answers How do I make a vertical video? How do I change the aspect ratio? How do I make a 9:16 video for TikTok? How do I make a square video for Instagram? Can I set a custom canvas size? How do I resize a video for YouTube Shorts? Related guides Crop a screen recording
Pick which part of the recording shows by dragging its crop frame, or zoom in with a slider. The crop applies to the whole timeline.
Make the video follow your mouse
When the canvas is smaller than the screen, Follow mouse pans the crop with your cursor, with smoothing for calm camera moves.
Resize a video for Reels, TikTok, or Shorts in your browser
Use the Frame tab to crop a landscape video to 9:16, square, or 4:5, and pick a canvas size preset such as Reel or 4K.
Crop a video to vertical or square on iPhone
Change a recording's shape to Reel 9:16, Square 1:1, or Portrait 4:5 and choose which part shows, for Reels, TikTok, or Shorts.
Still stuck? Support covers install, permissions and how to send feedback from the app.
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