1. Navigate to Templates and select the message you would like to edit.
2. This will open your sequence, which displays the existing messages and the triggers that will cause it to send. Select the plus icon.
3. Your actions will open in the sidebar to the right. Select Send SMS.
4. This will open a preview of the default SMS. You can select Edit to make changes to the default, or Add to directly add it to the sequence.
5. When you're finished, the SMS will appear in the sequence. You're done!