To fix your current problem, change

-sticky => 'we',
[download]

to

-sticky => 'nsew',
[download]

See Tk::Pane for details.

You also have quite a lot of other issues. Here's half a dozen that seemed immediately obvious:

• my $mw = MainWindow->new(); is a fairly standard convention. By using $mw for a different window, your code becomes confusing.
• You have "our $mw = $mw_top->Scrolled(Pane, ...". Beyond the $mw issue (in the last point), why are you using our instead of my?
• -gridded => 'y' is meaningless. See Tk::Pane for the reason.
• $mw->Frame; is pointless: other than using some memory and CPU, it does nothing.
• $frame_commons_first_level and $frame_entry_info have no content.
• our $t: again, why are you using our instead of my?

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.