Any project-scoped properties associated to the selected workflows and instances will be displayed in the Project Properties section. You can override available properties by clicking on the Override Properties button.
A required property is indicated with an asterisks to the left of the Key Name. By clicking the {} button to the right, you can toggle the value between being a literal value or a Groovy expression. Expressions can use variables like FD_PROJECT_NAME, FD_APPLICATION_NAME, FD_ENVIRONMENT_CODE, FD_TARGET_GROUP.
You can filter the displayed properties by entering part of the Key Name into the Filter text box.
For information on configuring these project properties see the Properties chapter Editing Project Properties