Hello Takamoto,

I made 3 changes to the code shown:

(1) Changed use Tk::Notebook; to use Tk::NoteBook; (note the uppercase letter B).

(2) Added:

my $CkMergedWindow1;
my $CkMergedWindow2;
my $CkMergedWindo3;
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to get the code to compile, as per tybalt89’s observation above.

(3) Changed this line:

my $PaneT = $page2->Scrolled('Frame',
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to this:

my $PaneT = $page2->Scrolled('NoteBook',
[download]

The resulting “right” tab now appears left-aligned, as desired. However, despite the call to Scrolled, there are still no scroll bars. :-(

Hope that helps (a little),