Select the Edit... command to open the Launch Configuration Dialog, and allow you to edit the launch configuration for the selected target.
The resulting launch configuration dialog, in this example a Java Application type.
Changing debugger launch options
Connecting to a remote VM with the Remote Java application launch configuration
Disconnecting from a VM
Launching a Java program
Preparing to debug
Resuming the execution of suspended threads
Running and debugging
Stepping through the execution of a program