+=head2 Automatic generation of miscellaneous dependencies.
+
+Some debhelper commands may make the generated package need to depend on
+some other packages. For example, if you use L<dh_installdebconf(1)>, your
+package will generally need to depend on debconf. Or if you use
+L<dh_installxfonts(1)>, your package will generally need to depend on a
+particular version of xutils. Keeping track of these miscellaneous
+dependencies can be annoying since they are dependent on how debhelper does
+things, so debhelper offers a way to automate it.
+
+All commands of this type, besides documenting what dependencies may be
+needed on their man pages, will automatically generate a substvar called
+B<${misc:Depends}>. If you put that token into your F<debian/control> file, it
+will be expanded to the dependencies debhelper figures you need.
+
+This is entirely independent of the standard B<${shlibs:Depends}> generated by
+L<dh_makeshlibs(1)>, and the B<${perl:Depends}> generated by L<dh_perl(1)>.
+You can choose not to use any of these, if debhelper's guesses don't match
+reality.
+
+=head2 Package build directories
+
+By default, all debhelper programs assume that the temporary directory used
+for assembling the tree of files in a package is debian/I<package>.
+
+Sometimes, you might want to use some other temporary directory. This is
+supported by the B<-P> flag. For example, "B<dh_installdocs -Pdebian/tmp>", will
+use B<debian/tmp> as the temporary directory. Note that if you use B<-P>, the
+debhelper programs can only be acting on a single package at a time. So if
+you have a package that builds many binary packages, you will need to also
+use the B<-p> flag to specify which binary package the debhelper program will
+act on.
+
+=head2 udebs
+
+Debhelper includes support for udebs. To create a udeb with debhelper,
+add "B<Package-Type: udeb>" to the package's stanza in F<debian/control>.
+Debhelper will try to create udebs that comply with debian-installer
+policy, by making the generated package files end in F<.udeb>, not
+installing any documentation into a udeb, skipping over
+F<preinst>, F<postrm>, F<prerm>, and F<config> scripts, etc.