No, I meant $tally_scroll->Subwidget("scrolled")->xview(moveto => 1), to scroll the listbox as far right as possible

perldoc Tk::Listbox:

*$listbox*->xview(moveto => *fraction*)
        Adjusts the view in the window so that *fraction* of the
        total width of the listbox text is off-screen to the left.
        *fraction* must be a fraction between 0 and 1.
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Kevin O'Rourke