Tap 
on the Preview screen to draw and doodle on your Snaps! Use your finger to draw, and tap ↩️ to undo!
To get a little more creative…
- Resize your brush by pinching your fingers in and out 👌
- Change the color of your brush with the color slider 🌈
- Change the color palette by tapping
- Draw with emoji by tapping the emoji button beneath the color slider!