diff --git a/html/config.js b/html/config.js
index c3b3a3e..6a1a318 100644
--- a/html/config.js
+++ b/html/config.js
@@ -40,6 +40,28 @@
 //range_outline_width = 1.7;
 //range_outline_colored_by_altitude = false;
 
+// which map is displayed to new visitors
+// valid values:
+// terrain_roads
+// osm
+// wikimedia
+// terrain_roads
+// terrain
+// carto_light_all
+// carto_light_nolabels
+// carto_dark_all
+// carto_dark_nolabels
+// only with bing key:
+// bing_aerial
+// bing_roads
+
+// which map is displayed to new visitors
+//MapType_tar1090 = "carto_light_all";
+
+// Default map dim state, true or false.
+//MapDim = true;
+
+
 // -- Marker settings -------------------------------------
 
 //markerScaleFactor = 1.2;
diff --git a/html/defaults.js b/html/defaults.js
index fd0dc98..20edcdc 100644
--- a/html/defaults.js
+++ b/html/defaults.js
@@ -40,6 +40,12 @@ var range_outline_color = '#0000DD';
 var range_outline_width = 1.7;
 var range_outline_colored_by_altitude = false;
 
+// which map is displayed to new visitors
+var MapType_tar1090 = "carto_light_all";
+
+// Default map dim state
+var MapDim = true;
+
 // -- Marker settings -------------------------------------
 
 var markerScaleFactor = 1.2;
diff --git a/html/script.js b/html/script.js
index 0c0a270..44cdef9 100644
--- a/html/script.js
+++ b/html/script.js
@@ -74,7 +74,7 @@ var SpecialSquawks = {
 };
 
 // Get current map settings
-var CenterLat, CenterLon, ZoomLvl, ZoomLvlCache, MapType_tar1090;
+var CenterLat, CenterLon, ZoomLvl, ZoomLvlCache;
 var zoomTimeout;
 
 
@@ -895,9 +895,9 @@ function initialize_map() {
     CenterLat = Number(localStorage['CenterLat']) || DefaultCenterLat;
     ZoomLvl = Number(localStorage['ZoomLvl']) || DefaultZoomLvl;
     ZoomLvlCache = ZoomLvl;
-    MapType_tar1090 = localStorage['MapType_tar1090'];
-    if (!MapType_tar1090)
-        MapType_tar1090="carto_light_all";
+    if (localStorage['MapType_tar1090']) {
+        MapType_tar1090 = localStorage['MapType_tar1090'];
+    }
 
     // Set SitePosition
     if (SiteLat != null && SiteLon != null) {
@@ -1118,7 +1118,7 @@ function initialize_map() {
         }
     }
 
-    if (localStorage['MapDim'] == undefined || localStorage['MapDim'] == "true") {
+    if (localStorage['MapDim'] === "true" || MapDim) {
         toggleMapDim(true);
     }
 
@@ -2538,6 +2538,7 @@ function dim(evt) {
 function toggleMapDim(switchOn) {
     if (!switchOn && localStorage['MapDim'] === "true") {
         localStorage['MapDim'] = "false";
+        MapDim = false;
 
         ol.control.LayerSwitcher.forEachRecursive(layers_group, function(lyr) {
             if (lyr.get('type') != 'base')
@@ -2556,6 +2557,7 @@ function toggleMapDim(switchOn) {
         */
     } else {
         localStorage['MapDim'] = "true";
+        MapDim = true;
 
         ol.control.LayerSwitcher.forEachRecursive(layers_group, function(lyr) {
             if (lyr.get('type') != 'base')