You can control the characteristics of a QMF session that you start by passing parameters to it. For example, there are parameters to identify the DB2 environment, the QMF plan, and other performance-related parameters. Tuning these parameters typically requires manual changes to CLISTs and EXECs. You can tune and customize these parameters by using the QMF Start-Up Parameters panel. You can specify values for the QMF start-up parameters, and you can start a QMF session using those parameters.