The easiest way is to go your calendar and click on an individual day to add, edit, or delete the info you wish to change.
1. Go to the menu to view the calendar.
2. From the calendar tap the date you wish to edit.
3. Tap on the info you'd like to edit. For example, if you are editing flow info, tap on "Flow"
4. Choose the new info you'd like to add
5. Tap your back function to return to the calendar, or on the calendar icon in the upper left, next to the date.