-\babelfont{rm}[Path = otf/,
-ItalicFont={OldStandard-Italic.otf},
-BoldFont={OldStandard-Bold.otf},
-BoldItalicFont={OldStandard-BoldItalic.otf}]{OldStandard-Regular.otf}
-
-\babelfont[greek]{rm}[Path = otf/,
-RawFeature={+ss05;+ss06},
-ItalicFont={OldStandard-Italic.otf},
-BoldFont={OldStandard-Bold.otf},
-BoldItalicFont={OldStandard-BoldItalic.otf}]{OldStandard-Regular.otf}
+% uncomment for testing:
+% \babelfont{rm}[Path = otf/,
+% ItalicFont={OldStandard-Italic.otf},
+% BoldFont={OldStandard-Bold.otf},
+% BoldItalicFont={OldStandard-BoldItalic.otf}]{OldStandard-Regular.otf}
+
+% \babelfont[greek]{rm}[Path = otf/,
+% RawFeature={+ss05;+ss06},
+% ItalicFont={OldStandard-Italic.otf},
+% BoldFont={OldStandard-Bold.otf},
+% BoldItalicFont={OldStandard-BoldItalic.otf}]{OldStandard-Regular.otf}
+
+% use the following two lines once Old Standard is installed:
+\babelfont{rm}{Old Standard}
+\babelfont[greek]{rm}[RawFeature={+ss05;+ss06}]{Old Standard}