Index: trunk/resources/data/defaultpresets.xml
===================================================================
--- trunk/resources/data/defaultpresets.xml	(revision 18447)
+++ trunk/resources/data/defaultpresets.xml	(revision 18448)
@@ -5654,5 +5654,6 @@
             <optional>
                 <reference ref="name_operator" />
-                <combo key="building:levels" text="Levels" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+                <combo key="building:levels" text="Levels above ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+                <combo key="building:levels:underground" text="Levels below ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
                 <text key="height" text="Height (meters)" length="7" />
             </optional>
@@ -5665,5 +5666,6 @@
             <optional>
                 <reference ref="name_operator" />
-                <combo key="building:levels" text="Levels" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+                <combo key="building:levels" text="Levels above ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+                <combo key="building:levels:underground" text="Levels below ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
                 <text key="height" text="Height (meters)" length="7" />
             </optional>
@@ -5674,6 +5676,7 @@
             <space />
             <combo key="building:part" text="Building part" values="allotment_house,bakehouse,barn,college,commercial,construction,cowshed,farm_auxiliary,garage,garages,greenhouse,hangar,hospital,industrial,office,parking,retail,roof,ruins,school,shed,supermarket,toilets,transportation,university,warehouse,yes" values_context="building" default="yes" match="keyvalue!" values_searchable="true" />
-            <combo key="building:levels" text="Levels" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+            <combo key="building:levels" text="Levels above ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
             <combo key="building:min_level" text="Skipped Levels" values="1,2,3,4,5,6,7,8,9,10" text_context="building" />
+            <combo key="building:levels:underground" text="Levels below ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
             <text key="height" text="Height (meters)" length="7" />
             <text key="min_height" text="Skipped height (meters)" />
@@ -5686,5 +5689,6 @@
             <optional>
                 <reference ref="name_operator" />
-                <combo key="building:levels" text="Levels" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+                <combo key="building:levels" text="Levels above ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
+                <combo key="building:levels:underground" text="Levels below ground" values="1,2,3,4,5,6,7,8,9,10,11" text_context="building" />
                 <text key="height" text="Height (meters)" length="7" />
             </optional>