-install them based on the section field in their .TH line and their filename
-extension. It also supports translated man pages, by looking for extensions
+install them based on the section field in their .TH line. If you have a
+properly formatted .TH line, your man page will be installed into the right
+directory, with the right name (this includes proper handling of pages
+with a subsection, like "3perl", which are placed in man3, and given an
+extention of ".3perl"). If your .TH line is incorrect or missing, the program
+may guess wrong based on the file extention.
+
+It also supports translated man pages, by looking for extensions