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How to draw arrows and steps over screenshots for a product tutorial with Khan Explainer

Turn product screenshots into a narrated tutorial with arrows, circles and numbered steps.

  • Content
  • Intermediate
  • 45 minutes
  • From the README
  • Claude Code

Who it is forA product manager, support lead or founder who must show a new user how to complete a task in the app.

The problemScreen recordings are slow to re-make after each UI change, and static screenshots do not explain the order of steps.

The outcomeA tutorial MP4 where arrows, circles and numbered steps are drawn over your screenshots while the voice explains each one.

What you need first

  • macOS
  • Node 20 or newer
  • ffmpeg (install with brew install ffmpeg)
  • Claude Code, since the repo installs as a Claude Code skill

Steps

  1. Complete the install steps: brew install ffmpeg, then git clone https://github.com/haiderfarooq3/khan-explainer ~/.claude/skills/khan-explainer, then cd ~/.claude/skills/khan-explainer/scripts && npm install && npx playwright install chromium.
  2. Run the example to see the draw-over-UI mode: cd ~/.claude/skills/khan-explainer and node scripts/render.js examples/ui-tutorial.js tutorial.mp4.
  3. Ask Claude Code: Draw over these screenshots and show a new user how to send their first invoice, and give it the screenshot files.
  4. Review the contact sheet path printed by the render to check that each arrow lands on the right element before you share the MP4.

Prompt for your agent

Using the khan-explainer skill, build a draw-over-UI tutorial from the screenshots in <screenshot folder> that shows a new user how to <task>. Expected output is a tutorial MP4 with arrows and numbered steps drawn over the screenshots. Verify with the contact sheet that every step points at the correct part of the screen.

Caveat. The README points to SKILL.md for the capture recipe for tutorials, so read that file before you prepare screenshots for a real product.

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