At any time you can edit a pool name, change its giving data type, enable self-assignment, and/or delete the pool. To access these settings within a pool, use the "Actions" dropdown menu in the upper right corner.
You can also access these options from the main pool management screen by clicking the three dots on any one of your pools.
Within "Pool Settings" (or "Edit Pool"), you can adjust the pool name, change the giving data type, and enabled/disable self-assignment.
Remember to hit Save when you're done making adjustments!