A page window is the definition of a rectangular output area on the output medium (for example, DIN A4 paper page), determined by the left upper edge and the hight and width of the area.
By defining page windows, you determine which windows you want to appear on a page, their sizes and their positions.
Starting with Release 4.0, the definition of page windows is required for the alphanumeric Form Painter only. If you use the graphical Form Painter, you can use the mouse to place the windows on the page (drag & drop, cut & paste). For more information on the graphical Form Painter, refer to BC - Style and Form Maintenance.