To schedule mass messages:
1. When creating a mass message, upload some content
2. Click/tap the calendar icon 📅 titled Schedule Message
3. Choose a date and time for when you want the mass message sent
4. Click/tap Save
5. Click/tap Schedule Message
To delete a scheduled mass message:
1. Open messages
2. Click/tap Mass Messages
3. Find the scheduled message you want to delete and click/tap it
4. Click/tap the wastebasket 🗑️ button > confirm Delete