1. Tap the blue plus sign in the lower right corner of the screen.
  2. Select the group or users to whom you want to send the message. A checkmark will appear next to each group or user you select. 
  3. Tap Done when all groups or users have been selected.
  4. Tap in the Type a secure message field at the bottom of the screen.
  5. Enter the message and tap the paper airplane icon to send the message.