I can find virtually no documentation whatsoever for the ATF "Test Generator".
This wasn't much of an issue until I saw what the front-end now looks like in Xanadu!
It's now really difficult to perform the simplest of test case extracts so I usually end up doing the whole lot and filter through the results after they have been executed for the first time.
The only decent filter criteria I have found so far is by restricting to users who are currently set as Active, and have been doing activities in the Test Instance in the last few weeks or months.
