diff --git a/pdf2htmlEX.1.in b/pdf2htmlEX.1.in
index 630ddb6..fd3745c 100644
--- a/pdf2htmlEX.1.in
+++ b/pdf2htmlEX.1.in
@@ -208,7 +208,7 @@ Whether to process non-text objects (as images)
.TP
.B --data-dir
(Default: @CMAKE_INSTALL_PREFIX@/share/pdf2htmlEX)
-Specify the folder holding the manifest and other files
+Specify the folder holding the manifest and other files (see below for the manifest file)`
.TP
.B --css-draw <0|1> (Default: 0)
@@ -231,6 +231,15 @@ Print copyright and version info
Print usage information
+.SH MANIFEST and DATA-DIR
+When split-pages is 0, the manifest file describes how the final html page should be generated.
+
+By default, pdf2htmlEX will use the manifest in the default data-dir (run `pdf2htmlEX -v` to check), which gives a simple demo of its syntax.
+
+You can modify the default one, or you can create a new one and specify the correct data-dir in the command line.
+
+When single-html is 1, all files referred by the manifest must be located in the data-dir.
+
.SH EXAMPLE
.TP
.B pdf2htmlEX /path/to/file.pdf
diff --git a/src/pdf2htmlEX.cc b/src/pdf2htmlEX.cc
index ba3eaec..1bfe6cb 100644
--- a/src/pdf2htmlEX.cc
+++ b/src/pdf2htmlEX.cc
@@ -48,6 +48,7 @@ void show_version_and_exit(const char * dummy = nullptr)
cerr << "Libraries: ";
cerr << "poppler " << POPPLER_VERSION << ", ";
cerr << "libfontforge " << ffw_get_version() << endl;
+ cerr << "Default data-dir: " << PDF2HTMLEX_DATA_PATH << endl;
exit(EXIT_SUCCESS);
}