To send a message to a group start be selecting the New Message button.
From there you can select the group or groups you would like to message. Note you can send to more than one group at a time. The TIC system will look for people that overlap between the groups to avoid sending the message twice if someone is in more than one of the groups selected.
After choosing the groups in Step 1, you can then go on to decide what type of message, the body of the message, and the time to send this message in Steps 2-4.