diff --git a/components/xdev_toolkit/dfmtolfm.ini b/components/xdev_toolkit/dfmtolfm.ini
index 6a5d0bdb9..dfbb0c086 100644
--- a/components/xdev_toolkit/dfmtolfm.ini
+++ b/components/xdev_toolkit/dfmtolfm.ini
@@ -127,11 +127,16 @@ THTMLViewer=
 
 ; List of fonts to substitute with the -s switch (for example, fonts
 ;  that don't exist on non-Windows platforms).
+
 ; Useful links:
 ;  http://www.angelfire.com/al4/rcollins/style/fonts.html
 ;  http://dustinbrewer.com/popular-fonts-with-their-mac-osx-windows-and-linux-equivalents/
 ;  http://mondaybynoon.com/2007/04/02/linux-font-equivalents-to-popular-web-typefaces/
 
+; Note that if you're targeting a specific platform, you can use this to
+;  substitute normal fonts for that platform, for example if targeting Mac:
+; Arial=Lucida Grande
+
 [FontSubstitutes]
 MS Sans Serif=Arial
 MS Serif=Times New Roman