The Parameters Options dialog box displays the value of the parameter in the Value box. If the value cannot be entirely displayed in the Value box (such as a list), click the View/Edit Complex Value button to open the Edit Complex Value dialog box.

• Internal user-defined environment variable parameter. You can edit the value.
• External or built-in environment variable parameter. You can view the value but you cannot modify it in this dialog box.

Use user-defined external environment variables

Environment variable parameters