Expressions are built in the large textbox. Operations (addition, subtraction, and so on) can be pasted into the expression textbox by clicking the corresponding buttons. The Function list contains functions available in Modeler:
By default, a general list of functions appears, but you can use the drop-down list above the Function list box to display functions of a certain type (for example, date and time functions, numeric functions, logical functions, and so on). Similarly, by default, all fields (and categories within a field) in the stream are listed in the Field list box and can be pasted into the expression by clicking ...
