diff --git a/XYmapper.css b/XYmapper.css
index ec19015..204f61b 100644
--- a/XYmapper.css
+++ b/XYmapper.css
@@ -201,6 +201,7 @@ a:hover { color: red; text-decoration: underline; }
 
 .ledGrid {
   clear: both;
+ padding-top: 1em;
 }
 
 .buildBox {
diff --git a/XYmapper.js b/XYmapper.js
index ac40252..cf03fcb 100644
--- a/XYmapper.js
+++ b/XYmapper.js
@@ -9,6 +9,7 @@ function clearTest() {
 var matrixName = "my_matrix";
 var freeStyle = 0;
 var num_leds = 0;
+var start_led = 0;
 var xdim = 0;
 var ydim = 0;
 var pixelarray = [];
@@ -170,7 +171,7 @@ function buildArray(num_leds) {
   clearAll = (document.getElementById("clearAllCHK")).checked;
   matrixName = (document.getElementById("matrixName")).value;
 
-  for (i = 0; i < num_leds; i++) {
+  for (i =  0; i < num_leds; i++) {
     pixelarray[i] = [];
     if (clearAll == 1) {
       pixelarray[i][0] = "D";	// E = Enable, D = Disable, H = Hidden
@@ -193,6 +194,8 @@ function buildGrid(numBoxes) {
   clearContents(container);
   xdim = Number(document.getElementById('xdim').value);
   ydim = Number(document.getElementById('ydim').value);
+  
+  start_led = Number(document.getElementById('start_led').value);
 
   num_leds = xdim * ydim; // set the max number pixels
   buildArray(num_leds);
@@ -338,7 +341,7 @@ function countActiveLEDs() {
 }
 
 function renumberLEDs() {
-  var activeLEDs = 0;
+  var activeLEDs = 0+start_led;
   var inactiveLEDs = countActiveLEDs();
   var xtemp = 0;
   var ytemp = 0;
diff --git a/index.html b/index.html
index ec484ba..a7d3d43 100644
--- a/index.html
+++ b/index.html
@@ -37,6 +37,10 @@ <h2>WLED-Ledmap.json-Generator</h2>
               <input id="ydim" type="number" name="ydim" min="1" value="5"/>
               <label class="inputText">Height</label>
             </div>
+            <div class="inputBox" style="margin-top:0.5em;">
+              	<input id="start_led" type="number" name="start" min="0" value="0"/>
+              	<label class="inputText">Start LED</label>
+             </div>
       </div>
       <div class="optionBox">
         <br>
@@ -55,7 +59,7 @@ <h2>WLED-Ledmap.json-Generator</h2>
             <label for="wLedCHK">Normal</label><br>
             <input type="radio" id="freeCHK" name="outputMode" onchange="freeOutput(this)">
             <label for="freeCHK">Freestyle <b>*</b></label><br>
-          </div><br>
+           </div><br>
       </div>
       <div class="optionBox">
         <div class="buildBox">