Format label text, by clicking the Font tab and changing the format options. Click the Parameter field button, and click Expression Editor. Click the OK button to apply changes. Click the Expression radio button. Double-click an Operator or Function, to add it to the expression.
Some functions contain generic information to be replaced with the correct details.
Click the OK button, to set the expression. Now you have seen the process to use the expression editor. Now you have seen the process to format label text.