Help center🎥 Live Classroom

For teachers

Whiteboard tools

Pen, highlighter, text, shapes, eraser — plus auto-save and undo/redo.

Tools available

  • ✏️ Pen — freehand draw (3 sizes, 8 colors)
  • 🖍 Highlighter — yellow translucent overlay
  • 🅰 Text — type any caption directly
  • ⭕ Circle / 📏 Line / ▭ Square — geometric shapes
  • 🧽 Eraser — selective or whole-area
  • ↶ Undo / ↷ Redo — last 50 actions
  • 🗑 Clear all — wipes the current slide

Auto-save

Every annotation is saved every 5 seconds. If you accidentally close the tab and rejoin, your whiteboard is restored.

Per-slide annotations

When you change slides, the annotations stay with the old slide. Come back to slide 3 → your circle and notes are still there.