| %QS | 
With this command, you can display multiple screens simultaneously.
%QS causes the next screen I/O not to be
                          executed. The corresponding output screen is kept internally until the
                          following I/O, when it is displayed together with the next screen. Therefore
                          %QS only makes sense if the second output screen is
                          a window, that is, if it does not entirely overlay the first screen that was
                          suppressed with %QS.
               
 Example: You can suppress the output of a screen A with
                          %QS; the next screen B is a window which partially
                          overlays screen A (perhaps a help window for one of the fields on screen A);
                          with the next screen I/O, the window B and the "underlying" screen
                          A are displayed simultaneously.
               
A %QS command only applies to the
                          subsequent screen.
               
Note:
 As %QS reduces the number of screen I/O
                             operations, it also improves performance.