Inserting aggregate function So far we inserted the aggregate functions into the "Text" object manually. Let us examine more convenient ways of aggregate functions insertion. First of all, we can use the "System text" object for the aggregate function value outputting. As a matter of fact, it is the same "Text" object, but one that has a special editor for more convenient insertion of system variables or aggregate functions. You should step by step select a function type, a data-band (according to which it will be counted), and a DB field or an expression, value of which will be computed. You can otherwise mark the "Count invisible bands" and "Running totals" flags. The second way is to use the "Text" object and the button in its editor. At that, the additional window, similar to the examined "System text" object editor, appears. When clicking the "OK" button, the call of the aggregate function is inserted into the object's text.