+.SH CONFIGURATION FILE
+.P
+Any of the command-line options mentioned above can be specified in a
+configuration file instead. We first look for \(dqhtsnrc\(dq in the
+system configuration directory (/etc on Unix). We then look for a file
+named \(dq.htsnrc\(dq in the user's home directory. The latter will
+override the former.
+.P
+The file's syntax is given by examples in the htsnrc.example file
+(included with \fBhtsn\fR).
+.P
+Options specified on the command-line override those in either
+configuration file.
+