In general, all options can be overwritten. Clear all fields whom you want to keep the value defined in the test action, and enter values in the fields only that you want to overwrite.
Preference
Description
...
Service
Overwrite the name of the Bridge service you want to start or stop.
Host
Overwrite the host, the service has been deployed to.
Port
Overwrite the port of the
...
Bridge.
Nodename
Overwrite the name of the node instance the service has been deployed to.
Username / Password
Overwrite a valid username and password to access the
...
Bridge.
Logfile
Overwrite name and path of the start log the Bridge will write on starting the service. This logfile will be compared to a reference log.