diff --git a/gramps/gen/plug/docgen/graphdoc.py b/gramps/gen/plug/docgen/graphdoc.py
index 53880fbd7..45d21508f 100644
--- a/gramps/gen/plug/docgen/graphdoc.py
+++ b/gramps/gen/plug/docgen/graphdoc.py
@@ -123,6 +123,7 @@ class GVOptions():
         self.h_pages    = None
         self.v_pages    = None
         self.page_dir   = None
+        self.dpi = None
 
     def add_menu_options(self, menu):
         """
@@ -217,9 +218,10 @@ class GVOptions():
         dpi = NumberOption(_("DPI"), 75, 20, 1200)
         dpi.set_help(_( "Dots per inch.  When creating images such as "
                         ".gif or .png files for the web, try numbers "
-                        "such as 100 or 300 DPI.  When creating PostScript "
-                        "or PDF files, use 72 DPI."))
+                        "such as 100 or 300 DPI.  PostScript and PDF files "
+                        "always use 72 DPI."))
         menu.add_option(category, "dpi", dpi)
+        self.dpi = dpi
 
         nodesep = NumberOption(_("Node spacing"), 0.20, 0.01, 5.00, 0.01)
         nodesep.set_help(_( "The minimum amount of free space, in inches, "
diff --git a/gramps/gui/plug/report/_graphvizreportdialog.py b/gramps/gui/plug/report/_graphvizreportdialog.py
index 3beb28330..23b1ee8b6 100644
--- a/gramps/gui/plug/report/_graphvizreportdialog.py
+++ b/gramps/gui/plug/report/_graphvizreportdialog.py
@@ -211,6 +211,24 @@ class GraphvizReportDialog(ReportDialog):
             fname = spath
         self.target_fileentry.set_filename(fname)
             
+        format_str = obj.get_format_str()
+        if format_str in ['gvpdf', 'gspdf', 'ps']:
+            # Always use 72 DPI for PostScript and PDF files.
+            self.__gvoptions.dpi.set_value(72)
+            self.__gvoptions.dpi.set_available(False)
+        else:
+            self.__gvoptions.dpi.set_available(True)
+
+        if format_str in ['gspdf', 'dot']:
+            # Multiple pages only valid for dot and PDF via GhostsScript.
+            self.__gvoptions.h_pages.set_available(True)
+            self.__gvoptions.v_pages.set_available(True)
+        else:
+            self.__gvoptions.h_pages.set_value(1)
+            self.__gvoptions.v_pages.set_value(1)
+            self.__gvoptions.h_pages.set_available(False)
+            self.__gvoptions.v_pages.set_available(False)
+
     def make_document(self):
         """Create a document of the type requested by the user.
         """