Length of Attribut needs a line break in Header-Report

Hello everyone, 
I have created a report with which I can insert a header into a new, empty BPMN process.
However, the individual attributes that are to be displayed in the header remain in one line and do not adapt to the length of the header. No line break is created. How do I adjust this?

as an example for an attribut which is placed: 

       //Prozessbeschreibung Text
       var prozessbeschreibungText = "Prozessbeschreibung: ";  // Fester Textbaustein
       var prozessbeschreibungTextObj = model.CreateTextOcc(x+1050,y+355,prozessbeschreibungText)
       prozessbeschreibungTextObj.AttrOccList()[0].setFontStyleSheet(fontAttrFU)        
       //Prozessbeschreibung405
       var prozessbeschreibungTypeNum = ArisData.ActiveFilter().UserDefinedAttributeTypeNum("AT_DESC");
       var prozessbeschreibungObj = model.CreateTextOcc(x+1500,y+355,prozessbeschreibungTypeNum)
       prozessbeschreibungObj.AttrOccList()[0].SetPortOptions(Constants.ATTROCC_PORT_FREE, 4)
       prozessbeschreibungObj.AttrOccList()[0].setFontStyleSheet(fontAttr)   

The content of the "prozessbeschreibungTypeNum" attribute varies in length and can therefore be very long. It is only not displayed with a line break.

Many thanks in advance