This is where you can decide to use active learning or not. Generally, for Level 1 screening you will be using active learning, so you can just leave the default “Predicted Relevance” setting as-is.
In the event you do not want to use active learning (e.g., you’re doing a pilot screening project or for whatever reason you don’t want to use active learning), you can also change the setting from “Predicted Relevance” to “Random.” In order to apply these settings, make sure you click “Save.”