A program is worth a million words. :-)

Here is a simple example. For very complex layouts, you can even have subframes within each horizontal frame. For instance when you want very hard to obtain alignments. Here are 2 examples which show the ropes.

#!/usr/bin/perl
use strict;
use Tk;
use Tk::Pane;

my $mw = MainWindow->new;

$mw->geometry( '1000x600' );

my $mwf = $mw->Scrolled(
   'Pane',
   -scrollbars => 'ose',
   -sticky     => 'nwse',
)->pack( -expand => 1, -fill => 'both' );

# make some frames to contain items on same line
my $f1 = $mwf->Frame()->pack( -expand => 1, -fill => 'both' );
my $f2 = $mwf->Frame()->pack( -expand => 1, -fill => 'both' );
my $f3 = $mwf->Frame()->pack( -expand => 1, -fill => 'both' );
my $f4 = $mwf->Frame()->pack( -expand => 1, -fill => 'both' );
my $f5 = $mwf->Frame()->pack( -expand => 1, -fill => 'both' ); 

#  ----------------------------------
#  | 400x500 (write only) text area |
#  ----------------------------------
#   Label1: drop down 
#   (user's input echo'd from Label1)
#   Label2: drop down 
#   (user's input echo'd from Label2)
#   Select Directory
#   (Text are with user's input dir echo'd)
#   Label3: drop down
#   (User's input echo'd from Label3)

my $text1 = $f1->Text(-bg => 'white')->pack(-side => 'left');
my $label1 = $f2->Label(-bg => 'lightseagreen', -text => 'left')
                   ->pack( -side => 'left');

my $label2 = $f2->Label(-bg => 'lightyellow', -text => 'right')
                   ->pack( -side => 'right');

my $text2 = $f3->Text(-bg => 'black')->pack(-side => 'right');


my $label3 = $f4->Label(-bg => 'hotpink', -text => 'bottom')
                   ->pack();
MainLoop();
[download]

and Label alignment

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

my $mw = MainWindow->new( -bg => 'beige', );

my $l = $mw->Frame(
   -width       => 111,
   -height      => 333,
   -relief      => "raised",
   -borderwidth => 2,
   -bg          => '#EEE000',
 )->pack(
   -fill   => 'x',
   -side   => 'left',
   -anchor => 'n',
 );


my $r = $mw->Frame(
   -width       => 111,
   -height      => 333,
   -relief      => "raised",
   -borderwidth => 2,
   -bg          => '#F0F000',
 )->pack(
   -fill   => 'both',
   -side   => 'left',
   -anchor => 'n',
 );

my $r2 = $mw->Frame(
   -width       => 111,
   -height      => 333,
   -relief      => "raised",
   -borderwidth => 2,
   -bg          => '#F0F000',
 )->pack(
   -fill   => 'both',
   -side   => 'left',
   -anchor => 'n',
 );


for ( qw[Name: Version: Description: Date: ] ){
   
   $l->Label(
      -text    => $_,
      -justify => 'left',
      -anchor  => 'w',
    )->pack(

#-anchor => 'e', # if you don't fill
      -fill => 'x',
    );

   $r->Label(
      -text => $_,

#    -justify => 'right',
      -anchor => 'e',
    )->pack(
      -anchor => 'e',    # if you don't fill

      #-fill => 'x',
    );

   $r2->Label(
      -text    => $_,
      -justify => 'right',

#    -anchor => 'e',
    )->pack(

#-anchor => 'e', # if you don't fill
#-fill => 'x',
    );
}

#$top->Label(-text => "Enter the scroll frame")->pack;
MainLoop;
[download]

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