diff --git a/main.js b/main.js
index f12bfdc..891f3ad 100644
--- a/main.js
+++ b/main.js
@@ -103,16 +103,18 @@ function setBackground(c) {
 }
 
 function setLinkOpacity(o, primary) {
-	if( primary ) {
-		link_ms[0].opacity = o;
+	if( structure.nolink2opacity ) {
+		link_ms.map((lm) => lm.opacity = o);
 	} else {
-		for( const lm of link_ms.slice(1) ) {
-			lm.opacity = o;
+		if( primary ) {
+			link_ms[0].opacity = o;
+		} else {
+			link_ms.slice(1).map((lm) => lm.opacity = o);
 		}
 	}
 }
 
-let gui; // 
+let gui; 
 
 
 function changeShape() {
diff --git a/polytopes.js b/polytopes.js
index a19d326..aceeb25 100644
--- a/polytopes.js
+++ b/polytopes.js
@@ -359,6 +359,16 @@ function link_labels(nodes, link) {
 // layer and the links follow that
 
 export const cell120_layered = (max) => {
+	const LAYER_NAMES = {
+		0: "North pole",
+		1: "Arctic circle",
+		2: "North temperate",
+		3: "Tropic of Cancer",
+		4: "Equator",
+		5: "Tropic of Capricorn",
+		6: "South temperate",
+		7: "Antarctic circle (all)"
+	};
 	const nodes  = make_120cell_vertices();
 	const links = auto_detect_edges(nodes, 4);
 
@@ -382,8 +392,8 @@ export const cell120_layered = (max) => {
 
 	for( const i of [ 0, 1, 2, 3, 4, 5, 6, 7 ] ) {
 		layers.push(i);
-		options.unshift({
-			name: "Layer " + String(i),
+		options.push({
+			name: LAYER_NAMES[i],
 			links: [...layers],
 			nodes: [...layers]
 		})
@@ -397,6 +407,7 @@ export const cell120_layered = (max) => {
 			node_size: 0.02,
 			link_size: 0.02
 		},
+		nolink2opacity: true,
 		options: options
 	}
 }
@@ -598,7 +609,6 @@ function get_node(nodes, id) {
 }
 
 function audit_link_labels(nodes, links) {
-	console.log("Link audit");
 	for( const l of links ) {
 		const n1 = get_node(nodes, l.source);
 		const n2 = get_node(nodes, l.target);