LSE provides the following commands for manipulating screens:

       CHANGE WINDOW_MODE (PF1-=)
           toggles the number of windows (between one and two) displayed.

       DELETE WINDOW
           deletes the current window.

       GOTO BUFFER
           moves to the specified buffer.

       GOTO FILE
           moves the cursor to the buffer containing the specified file.

       GOTO SCREEN
           moves the cursor by the number of lines in the current window.

       NEXT WINDOW (PF1-(DOWN ARROW))
           selects the alternate window.

       PREVIOUS WINDOW (PF1-(UP ARROW))
           selects the alternate window.

       REFRESH
           rewrites the display screen.

       SET SCREEN
           defines the display screen characteristics.

       SHIFT
           scrolls a window to the left or to the right.