gdk-window-lower (window)

window -- a gdk-window object

Lowers the window to the bottom of the z-order (stacking order), so that other windows with the same parent window appear above the window. This is true whether or not the other windows are visible.

If window is a toplevel, the window manager may choose to deny the request to move the window in the z-order, the function gdk-window-lower only requests the restack, does not guarantee it.

Note that the gdk-window-show function raises the window again, so do not call this function before the gdk-window-show function. Try the gdk-window-show-unraised function.