Try it

  1. Prepare first and last images with the same subject, lighting, and framing.
  2. Describe the action that happens between the two images.
  3. Check intermediate shapes and movement; if the difference is too large, try a smaller change.
Example prompt
Move smoothly from the first frame to the last frame. Keep the mug design and lighting consistent.

Requirements and considerations

Use a supported keyframe mode. Even with starting and ending images specified, check movement and consistency within each output.

Official guides and references