With your hands (✋ top right)

Good light, hand 40–70 cm from the camera, palm towards it.

• 🫰 Snap — summon the particles / dissolve the model
• ✊ Fist — put every part back · hold it still 2 s to go back · taking your hand away changes nothing
• ✊ → 🖐️ Fist, then open slowly — pull the organ apart (wider = further). Nothing grows unless you do this.
• ✊🔄 Twist or raise your fist — hold the model and turn / tilt it. An open hand never turns it.
• ☝️ Point — identify a part · 👌 pinch and move to pull it out (it stays) · pinch and twist to turn it · quick pinch to look inside
• 🙌 Two hands (both open or both pinching), apart / together — zoom · ✌️ Peace — next model
• Nothing turns by itself — it only moves when you move it

With a mouse or touch

• Drag to rotate, scroll or pinch to zoom
• Click a part to unfold it · right-click or Esc to go back
• Shift-drag a part to pull it out
• Space explode · S snap · F form · X release
• N / P next / previous · C cutaway · L labels · Q quiz
• D hand diagnostics — see what the camera detects