When selected, Designer displays the variables with fixed default values, which are hidden by default. You cannot override the default values assigned to these variables by mapping it to another variable or by assigning any input values to this variable during service execution. When the Show variables with fixed values property is selected, Designer displays these variables in the content and structure of service signatures, document and pipeline contents, and in the Run Configurations, Enter Input for serviceName, and Enter Input for variableName dialog boxes.