The Task option gives you the ability to create tasks which will appear on your main window on the Today tab.
To create a task select the Task button and the below window will appear:
Subject - enter the subject details
Task - enter the relevant task details
Date Due - the date the task will be carried out
Date Created - this will automatically default to today's date and cannot be amended
On completion, select Save.
The task will appear on your Today's window on the date entered for Date Due.