Filtering Tasks Using AND/OR/NOT

The following topic describes how to filter tasks using AND/OR/NOT.

To filter tasks using AND/OR/NOT:

Create a script that will return "1" whenever the task passes the filter conditions.
Create a calculated custom field that will return the value of that script.
Choose an existing task filter or create a new one.
Set filtering conditions for the calculated custom field.
Click the Current Task -> Subtasks... menu item.
Use the Filter Parameters pulldown to choose your filter.