How can I have something like in eclipse, highlight the lines, right click Source --> Format, and make the code line up nicely.
Finally I figured out. First download the plugin gzip from here: search.cpan.org/~azawawi/Padre-Plugin-PerlTidy-0.22/lib/Padre/…, then install it from Tools --> Module Tools --> Install Local Distribution. Then from Tools --> Plugin Manager, enable the Perl Tidy. Finally I can see this menu: Tools/Perl Tidy/Tidy the Active Document, as mentioned here padre.perlide.org/features/perl-tidy.html.