diff -r f57de4a9eb9c -r f037aa6699c3 doc-src/System/Thy/document/Presentation.tex
--- a/doc-src/System/Thy/document/Presentation.tex	Fri Mar 05 09:27:47 2010 -0800
+++ b/doc-src/System/Thy/document/Presentation.tex	Fri Mar 05 21:26:21 2010 +0100
@@ -198,14 +198,19 @@
 Usage: browser [OPTIONS] [GRAPHFILE]
 
   Options are:
+    -b           Admin/build only
     -c           cleanup -- remove GRAPHFILE after use
     -o FILE      output to FILE (ps, eps, pdf)
 \end{ttbox}
   When no filename is specified, the browser automatically changes to
   the directory \hyperlink{setting.ISABELLE-BROWSER-INFO}{\mbox{\isa{\isatt{ISABELLE{\isacharunderscore}BROWSER{\isacharunderscore}INFO}}}}.
 
-  \medskip The \verb|-c| option causes the input file to be
-  removed after use.
+  \medskip The \verb|-b| option indicates that this is for
+  administrative build only, i.e.\ no browser popup if no files are
+  given.
+
+  The \verb|-c| option causes the input file to be removed
+  after use.
 
   The \verb|-o| option indicates batch-mode operation, with the
   output written to the indicated file; note that \verb|pdf|