Windows are defined in the Layout sets which define the position and the text to displayed. The different types of windows are: MAIN – Main Window The main window is a continous window which can extend over several pages. If the text in the main window fills up a page, a new page is created. Only one main window can be defined in the SAP Script whereas upto 100 instances of main window can be created in a page. VAR – Variable Window This window can have the variable contents displayed on them. The contents of the window cannot exceed the window size. The content can be formatted for each page. CONST – Constant Window The constant window can have a fixed content and is formatted only once.