diff --git a/src/mame/layout/30test.lay b/src/mame/layout/30test.lay
index 02d0f3911b5..e9d0b99dea5 100644
--- a/src/mame/layout/30test.lay
+++ b/src/mame/layout/30test.lay
@@ -19,6 +19,8 @@
 		<bounds left="0" top="0" right="3.4" bottom="4.3" />
 
 
+<!-- the grid -->
+
 		<bezel name="digit0" element="digit">
 			<bounds x="0.0" y="1.3" width="0.2" height="0.3" />
 		</bezel>
@@ -297,7 +299,7 @@
 		</bezel>
 
 
-
+<!-- time -->
 
 		<bezel name="digit60" element="digit">
 			<bounds x="0.0" y="0.9" width="0.2" height="0.2" />
@@ -316,6 +318,7 @@
 		</bezel>
 
 
+<!-- today's highscores -->
 
 		<bezel name="digit64" element="digit">
 			<bounds x="0.9" y="0.3" width="0.2" height="0.2" />
@@ -344,6 +347,8 @@
 		</bezel>
 
 
+<!-- score -->
+
 		<bezel name="digit70" element="digit">
 			<bounds x="0.0" y="0.3" width="0.4" height="0.4" />
 		</bezel>
@@ -352,6 +357,9 @@
 			<bounds x="0.4" y="0.3" width="0.4" height="0.4" />
 		</bezel>
 
+
+<!-- ranking -->
+
 		<bezel name="lamp0" element="rank">
 			<bounds x="1.5" y="0.3" width="0.1" height="0.1" />
 		</bezel>