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After Effects: Drawing a mask with the Rectangle tool

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Demo summary

The demo shows selecting a video layer and drawing a rectangle to mask out unwanted edges of the footage.

Step-by-step

  1. Select the video layer in the timeline
  2. Select the Rectangle tool from the toolbar
  3. Click and drag on the composition to draw the mask shape
  4. Release the mouse to trim the footage outside the rectangle

Options

  • Start the mask drawing from any point on the screen

Tips

  • Start drawing slightly outside the frame to ensure the edges are fully covered
  • Draw the rectangle upwards to ensure vertical elements like steam are fully captured

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