The -pady option is a standard widget option, see Tk::options.

In addition, there are options -pady and -ipady for the geometry managers pack() and grid(). If you are using a different geometry manager, check the appropriate documentation - you should find a link to it on http://search.cpan.org/~srezic/Tk-804.030/.

There's an excellent discussion of geometry managers in the O'Reilly book Mastering Perl/Tk - the whole of chapter 2 is devoted to this subject.

I suspect using -ipady with pack() will probably do what you want but, as you've posted no code, I can only guess.