For version 1.7:
Tasks toolbar is shown on the picture:
It is applied for convenient choice of frequently used tasks.
Example:
Select, in consecutive order, a subject, a category, and a task.
You'll get the selected task loaded in the editor:
You can do with this document anything you want. It is usual document.
For example, change "a" value:
All the values of the task are recalculated and you see new values of the area and radii. Read more »