Full task-oriented tracking is the default and requires no additional configuration. Minimum tracking as well as product and developer oriented tracking are configured by inserting a task prefix for each in the Work with Task Settings which you will find via the Review System Settings available from the Administration Menu.
User options are set for each partition as described in 5.8.3 Partition Definitions - Create, Change or Delete.
In addition to the prefixes, for each task tracking level, you can set a Check in unlocking option in the Work with Task settings. When this option is set to 'Y', an object is unlocked from the task both on the IBM i and on the workstation when it is checked in. At the same time, it is changed to read-only on the workstation. To change an object again on the workstation, you must check it out for update.
Your choice of task tracking approach should also be reflected in the task tracking configuration settings of partition definitions. Most notably in the minimum, product-oriented and developer-oriented approaches there is usually no reason to allow users to change tasks while working. In these approaches there is also no need retain task history, so it can be purged.