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A required property is indicated with an asterisks to the left of the Key Name. By clicking the button between the Key Name and the Value, you can toggle the value between being a literal value 
and or an expression 
. Expression can use variables like FD_PROJECT_NAME, FD_APPLICATION_NAME, FD_ENVIRONMENT_CODE, FD_INSTANCE_CODE.
You can filter the displayed properties by entering part of the Key Name into the Filter text box and clicking the Filter button (filters using contains operation). By clicking on the clipboard icon 
to the right of the Key Name, you can copy the Property Name to your clipboard.
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