The application window gets text sent to the PRINT device output from an executing program. In the case of a forms program the window may never be visible if no tangible PRINT output has been issued (escape sequences changing attributes only will be ignored but HEX(03) or text will cause the window to be instantiated). Unlike the console window it is a fixed 80x25 size and cannot be resized though exceptionally it can be switched to 132x80 under program control. It or a form will always be the active window when a KCML program is executing. F4 can be used in the debugger to bring the output window or form to the foreground though it will be greyed out to show that it is inactive. Pressing the Esc key will return the display to the editor/debugger window.