In the DBT section of the app, select the desired date, then click on the +/- button which takes you to the DBT Library. In the library, you can select a DBT by checking the box next to the desired DBT or unselect a DBT by unchecking the box next to the DBT you would like to remove. When finished, save your changes. You will now see a red dot on the calendar signifying you have scheduled a DBT for that day.