diff --git a/desktop/sources/scripts/dotgrid.js b/desktop/sources/scripts/dotgrid.js
index 26845d7..5e5d1ea 100644
--- a/desktop/sources/scripts/dotgrid.js
+++ b/desktop/sources/scripts/dotgrid.js
@@ -368,7 +368,7 @@ function Dotgrid(width,height,grid_x,grid_y,block_x,block_y)
   this.preview = function(operation)
   {
     if(this.preview_prev == operation){ return; }
-    this.preview_el.innerHTML = !operation ? `<path d='M0,0'></path>` : `<path d='${dotgrid.tool.path([{type:operation,verteces:dotgrid.tool.verteces}])}'></path>`;
+    this.preview_el.innerHTML = !operation ? `<path d='M0,0'></path>` : `<path d='${dotgrid.tool.path(dotgrid.tool.index,[{type:operation,verteces:dotgrid.tool.verteces}])}'></path>`;
     this.preview_prev = operation;
   }
 
diff --git a/desktop/sources/scripts/tool.js b/desktop/sources/scripts/tool.js
index d557076..2ddff75 100644
--- a/desktop/sources/scripts/tool.js
+++ b/desktop/sources/scripts/tool.js
@@ -164,9 +164,9 @@ function Tool()
     return this.verteces.length >= this.reqs[type];
   }
 
-  this.path = function(layer_id = 0)
+  this.path = function(layer_id = 0, preview = null)
   {
-    var layer = this.layers[layer_id];
+    var layer = preview ? preview : this.layers[layer_id];
 
     var html = "";
     for(id in layer){