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A new window will open to show a list of all available questions from all available sources. The Bank you have imported should be visible in the Questions Banks section of the list. Checking it will show all the questions inside that bank; you will be free to select as few or as many questions from the bank as you wish. These questions will be the available questions the pool can pull from. Click "Add Questions" at the bottom when you have finished selecting questions, and the selected questions from the bank will be added into your test. 
pool will be added.
Once the pool is added, you can select how many questions from the pool are displayed to any given students. When a student takes this test, the pool will pick this number of questions at random from the pool for the student to answer. Click "Save" to save this final setting.
You can also use Reuse Questions to open up a list of available test questions to add to a test. This method looks very similar to using Question Pools, but copies all selected questions directly onto the test.
