diff --git a/main.js b/main.js
index aefd8ad..d5e2c66 100644
--- a/main.js
+++ b/main.js
@@ -32,7 +32,6 @@ app.on('ready', () =>
   app.win = new BrowserWindow({width: 400, height: 420, minWidth: 400, minHeight: 420, backgroundColor:"#000", frame:false, autoHideMenuBar: true, icon: __dirname + '/icon.ico'})
 
   app.win.loadURL(`file://${__dirname}/sources/index.html`);
-  app.win.toggleDevTools();
   
   app.win.on('closed', () => {
     win = null
diff --git a/sources/scripts/dotgrid.js b/sources/scripts/dotgrid.js
index 32ecb7a..db9c172 100644
--- a/sources/scripts/dotgrid.js
+++ b/sources/scripts/dotgrid.js
@@ -153,6 +153,7 @@ function Dotgrid(width,height,grid_x,grid_y,block_x,block_y,thickness = 3,lineca
 
     document.addEventListener('mousedown', function(e){ dotgrid.mouse_down(e); }, false);
     document.addEventListener('mousemove', function(e){ dotgrid.mouse_move(e); }, false);
+    document.addEventListener('contextmenu', function(e){ dotgrid.mouse_alt(e); }, false);
     document.addEventListener('mouseup', function(e){ dotgrid.mouse_up(e);}, false);
     document.addEventListener('copy', function(e){ dotgrid.copy(e); e.preventDefault(); }, false);
     document.addEventListener('paste', function(e){ dotgrid.paste(e); e.preventDefault(); }, false);
@@ -260,6 +261,13 @@ function Dotgrid(width,height,grid_x,grid_y,block_x,block_y,thickness = 3,lineca
     this.draw();
   }
 
+  this.mouse_alt = function(e)
+  {
+    var pos = this.position_in_grid(new Pos(e.clientX+5,e.clientY-5)); pos = this.position_on_grid(pos);
+    dotgrid.tool.remove_segments_at(pos);
+    this.draw();
+  }
+
   this.move_cursor = function(pos)
   {
     if(pos.x>0) {