diff --git a/server/eventWorld.js b/server/eventWorld.js
index 9cfb78e..b4f7971 100644
--- a/server/eventWorld.js
+++ b/server/eventWorld.js
@@ -57,16 +57,18 @@ const ZONE_MESSAGE_MAX = 256
 const DOME_STACK_MAX = 10
 
 /**
- * ZoneDomes' own sphere types, by the number its API takes (D194). The colours
- * show only where the sphere meets terrain or a structure; ZoneDomes says so
- * itself.
+ * ZoneDomes' own sphere types, by the number its API takes (D194). Only Standard
+ * is a whole dome: Rust's shaded sphere, darker with each stacked copy. The four
+ * colours are the Twitch battle-royale spheres, which show only where they cut
+ * terrain or a structure (ZoneDomes says so itself), so they read as a ring at
+ * the zone's edge. Standard is the default (D212).
  */
 const DOMES = [
-  { value: 'standard', type: 0, label: 'Standard (shaded)' },
-  { value: 'red', type: 1, label: 'Red' },
-  { value: 'blue', type: 2, label: 'Blue' },
-  { value: 'green', type: 3, label: 'Green' },
-  { value: 'purple', type: 4, label: 'Purple' },
+  { value: 'standard', type: 0, label: 'Full dome (shaded) — the default' },
+  { value: 'red', type: 1, label: 'Red — only where it meets the ground or a building' },
+  { value: 'blue', type: 2, label: 'Blue — only where it meets the ground or a building' },
+  { value: 'green', type: 3, label: 'Green — only where it meets the ground or a building' },
+  { value: 'purple', type: 4, label: 'Purple — only where it meets the ground or a building' },
 ]
 
 /** The ledger kind both verbs file under. */
@@ -580,7 +582,8 @@ const ACTIONS = [
         required: false,
         example: 'standard',
         source: 'rust.options.domes',
-        description: 'A ZoneDomes dome over the zone, by colour. Needs ZoneDomes and RunicGatewayDomes.cs on the server. Blank is no dome.',
+        description:
+          'A ZoneDomes dome over the zone. "standard" is a full shaded dome; the colours show only where the sphere meets the ground or a building. Needs ZoneDomes and RunicGatewayDomes.cs on the server. Blank is no dome.',
       },
       { name: 'domeStack', type: 'int', required: false, example: 1, description: `How many spheres the dome stacks, 1 to ${DOME_STACK_MAX}; more is darker. Left blank, 1.` },
     ],