lower - Change a window's position in the stacking order

       If  the  belowThis  argument  is  omitted  then  the command lowers window so that it is below all of its
       siblings in the stacking order (it will be obscured by any siblings that overlap it and will not  obscure
       any  siblings).   If  belowThis  is  specified then it must be the path name of a window that is either a
       sibling of window or the descendant of a sibling of window.  In this case the lower command  will  insert
       window  into  the  stacking order just below belowThis (or the ancestor of belowThis that is a sibling of
       window); this could end up either raising or lowering window.

       All toplevel windows may be restacked with respect to each other, whatever their relative path names, but
       the window manager is not obligated to strictly honor requests to restack.

       lower, obscure, stacking order

Tk                                                     3.3                                            lower(3tk)

       lower - Change a window's position in the stacking order

       raise

lowerwindow ?belowThis?
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