diff --git a/app/src/main/java/com/wytehat/btlogger/MapActivity.java b/app/src/main/java/com/wytehat/btlogger/MapActivity.java
index 0bbf5a4..3fce641 100644
--- a/app/src/main/java/com/wytehat/btlogger/MapActivity.java
+++ b/app/src/main/java/com/wytehat/btlogger/MapActivity.java
@@ -32,7 +32,7 @@ private boolean mapReady;
 
 private LinearLayout filterPanel;
 private ScrollView filterScroll;
-private TextView filterHeader;
+private Button filterButton;
 private boolean filtersExpanded = false;  
 
 private Spinner deviceSpinner;  
@@ -171,38 +171,49 @@ protected void onCreate(Bundle state) {
             )  
     );  
 
-    filterHeader =  
-            new TextView(this);  
+    /*
+     * Compact filter button -- a small button that sits on its own row,
+     * not a full-width grey bar eating 48dp above the map.
+     */
+    LinearLayout filterHeaderRow =
+            new LinearLayout(this);
 
-    filterHeader.setText(  
-            "Map Filters  ▼"  
-    );  
+    filterHeaderRow.setOrientation(
+            LinearLayout.HORIZONTAL
+    );
 
-    filterHeader.setTextSize(16);  
-    filterHeader.setTextColor(Color.DKGRAY);  
+    filterHeaderRow.setGravity(
+            Gravity.CENTER_VERTICAL
+    );
 
-    filterHeader.setGravity(  
-            Gravity.CENTER_VERTICAL  
-    );  
+    filterHeaderRow.setPadding(
+            dp(8),
+            dp(2),
+            dp(8),
+            dp(2)
+    );
 
-    filterHeader.setPadding(  
-            dp(14),  
-            dp(10),  
-            dp(14),  
-            dp(10)  
-    );  
+    filterButton =
+            new Button(this);
 
-    filterHeader.setBackgroundColor(  
-            Color.rgb(238, 238, 238)  
-    );  
+    filterButton.setText("☰  Filters");
+    filterButton.setTextSize(13);
 
-    root.addView(  
-            filterHeader,  
-            new LinearLayout.LayoutParams(  
-                    LinearLayout.LayoutParams.MATCH_PARENT,  
-                    dp(48)  
-            )  
-    );  
+    filterHeaderRow.addView(
+            filterButton,
+            new LinearLayout.LayoutParams(
+                    LinearLayout.LayoutParams.WRAP_CONTENT,
+                    LinearLayout.LayoutParams.WRAP_CONTENT
+            )
+    );
+
+    root.addView(
+            filterHeaderRow,
+            new LinearLayout.LayoutParams(
+                    LinearLayout.LayoutParams.MATCH_PARENT,
+                    LinearLayout.LayoutParams.WRAP_CONTENT
+            )
+    );
 
     filterPanel =  
             new LinearLayout(this);  
@@ -255,7 +266,7 @@ protected void onCreate(Bundle state) {
             )
     );
 
-    filterHeader.setOnClickListener(  
+    filterButton.setOnClickListener(
             new View.OnClickListener() {  
                 @Override  
                 public void onClick(View view) {  
@@ -1066,11 +1077,7 @@ private void setFiltersExpanded(
                     : View.GONE
     );
 
-    filterHeader.setText(  
-            expanded  
-                    ? "Map Filters  ▲"  
-                    : "Map Filters  ▼"  
-    );  
+    filterButton.setText("☰  Filters");
 }  
 
 private TextView filterLabel(  
diff --git a/app/src/main/java/com/wytehat/btlogger/MapHtmlBuilder.java b/app/src/main/java/com/wytehat/btlogger/MapHtmlBuilder.java
index e81cbfa..625cb75 100644
--- a/app/src/main/java/com/wytehat/btlogger/MapHtmlBuilder.java
+++ b/app/src/main/java/com/wytehat/btlogger/MapHtmlBuilder.java
@@ -549,6 +549,7 @@ public final class MapHtmlBuilder {
             + "<style>"
             + "html,body,#map{height:100%;margin:0}"
             + ".leaflet-popup-content{font:14px sans-serif;line-height:1.5}"
+            + ".leaflet-control-layers{font:13px sans-serif}"
 
             + ".phone-bearing{"
             + "position:relative;"
@@ -600,10 +601,13 @@ public final class MapHtmlBuilder {
 
             + "map=L.map('map',{layers:[streets]}).setView([20,0],2);"
 
+            // collapsed:true is what makes this the floating corner button
+            // that opens on tap. collapsed:false pins the whole list open
+            // over the map as a permanent box.
             + "L.control.layers({"
             + "'Streets':streets,"
             + "'Satellite':sat"
-            + "},null,{collapsed:false}).addTo(map);"
+            + "},null,{collapsed:true}).addTo(map);"
 
             + "var phone=null,phoneShown=false,"