There may be an applications default file, usually named Xfoo.ad in the original Xfoo distribution. Failure to do this may cause the software to behave strangely or even refuse to run.
Most software packages come with one or more preformatted man pages.
Of course, you may deviate from this on your own system, if you like. A few packages will not install the binaries in the appropriate system directories, that is, they are missing the install option in the Makefile .