Does this do what you want?

#!/usr/bin/perl

use strict;
use warnings;
use Tk;
use Tk::Adjuster;
use Tk::Pane;

my $mw = MainWindow->new;
my $C = $mw->Frame(-bg => 'red', -width => 200, -height => 200,
  )->pack(-side => 'bottom', -expand => 0, -fill => 'x');
$mw->Adjuster()->packAfter($C, -side => 'bottom');
my $B = $mw->Scrolled(Frame => -scrollbars => 'osoe', -sticky => 'nsew
+',
  -bg => 'green', -width => 100, -height => 200,
  )->pack(-side => 'right', -expand => 0, -fill => 'y');
$mw->Adjuster()->packAfter($B, -side => 'right');
$mw->Frame(-bg => 'blue', -width => 200, -height => 200,
  )->pack(-expand => 1, -fill => 'both');

$C->Button(-text => 'Quit', -command => sub {$mw->destroy},
  )->pack(-side => 'right');
$C->Button(-text => $_)->pack(-side => 'left') for qw( one two three f
+our);
$B->Label(-text => $_)->pack(-fill => 'x') for 'Element Properties',
  qw( one two three four five six seven eight nine ten);

MainLoop;
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