But watch out for memory gains if you place new frames in there. packForget dosn't destroy the widget, it just removes it from view. So reuse your frames and widgets.... by packForget'ing them, reconfiguring them in the withdrawn state, then repacking them. There are some details to work on, like unwanted resizing occurring, so you may need to repack the entire window. YMMV

#!/usr/bin/perl
use warnings;
use strict;
use Tk;

my $top = new MainWindow;
my $txt = $top->Scrolled("Text")->pack;

$top->Button(-text => "packForget",
          -command => sub{
                  my @w = $top->packSlaves;
                  foreach (@w) { $_->packForget; }
            })->pack();

$top->Button(-text => "Exit",
         -command => sub {exit})->pack;

MainLoop;

__END__
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Thanks for the reply. Thanks also for the warnings...