This was really helpful. I was also thinking of using hash for storing and re-positioning the text items upon clicking on up and down button. I proceeded as below but a bit stuck. Let us assume I have put your code in a subroutine called build_layout()

my $dynamic_hash = {0 => "job",1=> "state",2 =>"dependencies",3=>"resu
+lt"};

&build_layout($init_hash);

sub build_layout
{
## samething  what u have sent
foreach my $itemkey (sort keys %$dynamic_hash)
{
    my $btn=$text->Checkbutton(%attr_item,'-activebackground'=>'#ff7f7
+f'
);
    my $up=$text->Button(-text=>'Up',%attr_btn, -command => [\&moveup,
+${$dynamic_hash}{$itemkey} );
    my $down=$text->Button(-text=>'Down',%attr_btn,)-command => [\&mov
+edown,${$dynamic_hash}{$itemkey};
    .....
    .....
    $text->insert('1.0',sprintf('%-'.$item_width.'s',${$dynamic_hash}{
+$itemkey}));

}

sub  moveup
{
   my $text = shift

   ### not able to proceed here 
}
sub movedown
{
}
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