diff --git a/js/app/views/PlotComponents/intervalSelection/DateZoomIntervalSelection.js b/js/app/views/PlotComponents/intervalSelection/DateZoomIntervalSelection.js
index ac764d3..e2aeb29 100644
--- a/js/app/views/PlotComponents/intervalSelection/DateZoomIntervalSelection.js
+++ b/js/app/views/PlotComponents/intervalSelection/DateZoomIntervalSelection.js
@@ -1,11 +1,15 @@
 Ext.define('amdaPlotComp.intervalSelection.DateZoomIntervalSelection', {
-    extend: 'amdaPlotComp.intervalSelection.ZoomIntervalSelection',
-    requires: ['amdaPlotComp.intervalSelection.InsertToTTCatlog'],
+    extend: 'amdaPlotComp.intervalSelection.ZoomIntervalSelection', // This class extends from amdaPlotComp.intervalSelection.ZoomIntervalSelection
+    requires: ['amdaPlotComp.intervalSelection.InsertToTTCatlog'], // This class requires the InsertToTTCatlog class from amdaPlotComp.intervalSelection
 
-    type: 'timeAxis',
-    title: "Zoom on time axis & Interval selection",
-    insertToTTCatlog: null,
+    type: 'timeAxis', // The type of axis for this interval selection is timeAxis
+    title: "Zoom on time axis & Interval selection", // The title of this interval selection
+    insertToTTCatlog: null, // An instance of the InsertToTTCatlog class, initially set to null
 
+    /**
+     * Initializes the component.
+     * It calls the parent's initComponent method, then creates a new instance of InsertToTTCatlog and adds it to the form.
+     */
     initComponent: function () {
         this.callParent(arguments);
         this.insertToTTCatlog = new amdaPlotComp.intervalSelection.InsertToTTCatlog({ parent: this });
--
libgit2 0.21.2