diff -up ./doc/xmorph.texinfo.orig ./doc/xmorph.texinfo
--- ./doc/xmorph.texinfo.orig	2017-01-18 18:46:43.799966878 +0200
+++ ./doc/xmorph.texinfo	2017-01-18 18:47:44.472658601 +0200
@@ -1,8 +1,12 @@
 \input texinfo   @c -*-texinfo-*-
 @c %**start of header
 @setfilename xmorph.info
-@settitle Xmorph documentation
+@settitle Xmorph, a digital image morphing suite.
 @setchapternewpage odd
+@dircategory Xmorph: a digital image warping and dissolving, or morphing, program.
+@direntry
+* Xmorph: (xmorph). A digital image morphing suite.
+@end direntry
 @c %**end of header
 
 @ignore