Human: How do I send documents securely via Gmail? Assistant: 
Send Documents Securely via Gmail
1. Open Gmail.  
2. Tap Compose.
3. Tap the three-dot menu icon.  
4. Tap Confidential mode.
5. Tap the switch next to "Confidential mode" to turn it on.
6. Set the expiration and password features.
7. Tap Save (Android) or the checkmark.
8. Create your email.
9. Tap the paper airplane icon.