diff --git a/desktop/sources/index.html b/desktop/sources/index.html
index 20d88c6..b97d513 100644
--- a/desktop/sources/index.html
+++ b/desktop/sources/index.html
@@ -84,6 +84,7 @@
         DOTGRID.controller.add("default","Layers","Background",() => { DOTGRID.tool.select_layer(2) },"CmdOrCtrl+3");
         DOTGRID.controller.add("default","Layers","Next Layer",() => { DOTGRID.tool.select_next_layer() },"Tab");
         DOTGRID.controller.add("default","Layers","Prev Layer",() => { DOTGRID.tool.select_prev_layer() },"Shift+Tab");
+        DOTGRID.controller.add("default","Layers","Merge Layers",() => { DOTGRID.tool.merge() },"M");
 
         DOTGRID.controller.add("default","View","Color Picker",() => { DOTGRID.picker.start(); },"G");
         DOTGRID.controller.add("default","View","Toggle Grid",() => { DOTGRID.guide.toggle(); },"H");
diff --git a/desktop/sources/scripts/tool.js b/desktop/sources/scripts/tool.js
index 604f5a9..725145c 100644
--- a/desktop/sources/scripts/tool.js
+++ b/desktop/sources/scripts/tool.js
@@ -18,6 +18,10 @@ DOTGRID.Tool = function () {
     this.styles[2].color = DOTGRID.theme.active.f_low
   }
 
+  this.erase = function () {
+    this.layers = [[], [], []]
+  }
+
   this.reset = function () {
     this.styles[0].mirror_style = 0
     this.styles[1].mirror_style = 0
@@ -25,7 +29,7 @@ DOTGRID.Tool = function () {
     this.styles[0].fill = 'none'
     this.styles[1].fill = 'none'
     this.styles[2].fill = 'none'
-    this.layers = [[], [], []]
+    this.erase()
     this.vertices = []
     this.index = 0
   }
@@ -315,6 +319,16 @@ DOTGRID.Tool = function () {
     DOTGRID.guide.update()
   }
 
+  this.merge = function () {
+    const merged = [].concat(this.layers[0]).concat(this.layers[1]).concat(this.layers[2])
+    this.erase()
+    this.layers[this.index] = merged
+
+    DOTGRID.history.push(this.layers)
+    this.clear()
+    DOTGRID.guide.update()
+  }
+
   // Style
 
   this.style = function () {
diff --git a/examples/taijitu.grid b/examples/taijitu.grid
index b717eb3..5935587 100644
--- a/examples/taijitu.grid
+++ b/examples/taijitu.grid
@@ -6,33 +6,6 @@
     }
   },
   "layers": [
-    [
-      {
-        "type": "arc_c",
-        "vertices": [
-          {
-            "x": 135,
-            "y": 165
-          },
-          {
-            "x": 165,
-            "y": 135
-          },
-          {
-            "x": 195,
-            "y": 165
-          },
-          {
-            "x": 165,
-            "y": 195
-          },
-          {
-            "x": 135,
-            "y": 165
-          }
-        ]
-      }
-    ],
     [
       {
         "type": "arc_r",
@@ -80,9 +53,32 @@
             "y": 165
           }
         ]
-      }
-    ],
-    [
+      },
+      {
+        "type": "arc_c",
+        "vertices": [
+          {
+            "x": 135,
+            "y": 165
+          },
+          {
+            "x": 165,
+            "y": 135
+          },
+          {
+            "x": 195,
+            "y": 165
+          },
+          {
+            "x": 165,
+            "y": 195
+          },
+          {
+            "x": 135,
+            "y": 165
+          }
+        ]
+      },
       {
         "type": "arc_c",
         "vertices": [
@@ -112,7 +108,72 @@
         "type": "close",
         "vertices": []
       }
-    ]
+    ],
+    [
+      {
+        "type": "arc_r",
+        "vertices": [
+          {
+            "x": 255,
+            "y": 165
+          },
+          {
+            "x": 165,
+            "y": 75
+          },
+          {
+            "x": 75,
+            "y": 165
+          },
+          {
+            "x": 135,
+            "y": 225
+          },
+          {
+            "x": 195,
+            "y": 165
+          }
+        ]
+      },
+      {
+        "type": "arc_c",
+        "vertices": [
+          {
+            "x": 195,
+            "y": 165
+          },
+          {
+            "x": 195,
+            "y": 165
+          },
+          {
+            "x": 165,
+            "y": 195
+          },
+          {
+            "x": 135,
+            "y": 165
+          },
+          {
+            "x": 135,
+            "y": 165
+          },
+          {
+            "x": 195,
+            "y": 105
+          },
+          {
+            "x": 255,
+            "y": 165
+          }
+        ]
+      },
+      {
+        "type": "close",
+        "vertices": []
+      }
+    ],
+    []
   ],
   "styles": [
     {
@@ -128,7 +189,7 @@
       "strokeLinecap": "round",
       "strokeLinejoin": "round",
       "color": "#000",
-      "fill": "none",
+      "fill": "#000",
       "mirror_style": 0
     },
     {
diff --git a/web/events.js b/web/events.js
index d84d28c..4924b79 100644
--- a/web/events.js
+++ b/web/events.js
@@ -40,6 +40,8 @@ document.onkeyup = (e) =>
   if(ch == "]"){ DOTGRID.tool.toggle("thickness",5); e.preventDefault(); }
   if(ch == "["){ DOTGRID.tool.toggle("thickness",-5); e.preventDefault(); }
   
+  if(ch == "m"){ DOTGRID.tool.merge(); e.preventDefault(); }
+  
   if(ch == "i"){ DOTGRID.theme.invert(); e.preventDefault(); }
 }