How to fine-tune the sensitivity of Bagging parameters using Weka extensions?

Sorry, but I’ve just started using KNIME, so I’m not very familiar with it yet. As mentioned in the title, I would like to understand how to fine-tune sensitivity using the Weka extensions. Normally, I would use a Parameter Optimization Loop Start, X-Aggregator, X-Partitioner, and Parameter Optimization Loop End. How can I apply this to fine-tune the parameters of the Bagging node?