diff --git a/custom_preparation_display/models/customposorder.py b/custom_preparation_display/models/customposorder.py
index 5b44a86..57f8941 100644
--- a/custom_preparation_display/models/customposorder.py
+++ b/custom_preparation_display/models/customposorder.py
@@ -9,22 +9,14 @@ class CustomPosOrder(models.Model):
         for order in self:
             pos_config = self.env['pos.config']
             displays = self.env['pos_preparation_display.display'].search([])
-            # displays = pos_config.pos_preparation_display.display_ids
 
+            # refresh the display using bus.bus service (in js bus_service)
+            # with channel 'preparation_display-{display.access_token}'
+            # and message 'load_orders' with data {'preparation_display_id': display.id, 'sound': True}
             for display in displays:
                 #self.env['pos_preparation_display.display']._send_load_orders_message()
                 self.env['bus.bus']._sendone(f'preparation_display-{display.access_token}', 'load_orders', {
                     'preparation_display_id': display.id,
                     'sound': True
                 })
-        return res
-        
-    # def _process_saved_order(self, draft):
-    #     self.ensure_one()
-    #     order_id = super()._process_saved_order(draft)
-    #     self.send_table_count_notification(self.table_id)
-    #     self.env['bus.bus']._sendone(f'preparation_display-{self.access_token}', 'load_orders', {
-    #         'preparation_display_id': self.id,
-    #         'sound': True
-    #     })
-    #     return order_id
\ No newline at end of file
+        return res
\ No newline at end of file
diff --git a/custom_preparation_display/static/src/override/pos_preparation_display/components/order/customprepdisplay.js b/custom_preparation_display/static/src/override/pos_preparation_display/components/order/customprepdisplay.js
index 1bf439f..5c5f32c 100644
--- a/custom_preparation_display/static/src/override/pos_preparation_display/components/order/customprepdisplay.js
+++ b/custom_preparation_display/static/src/override/pos_preparation_display/components/order/customprepdisplay.js
@@ -5,6 +5,7 @@ import { useService } from "@web/core/utils/hooks";
 import { PreparationDisplay } from "@pos_preparation_display/app/models/preparation_display";
 
 patch(PreparationDisplay.prototype, {
+    //override the setup of preparation display
     async setup(data, env, preparationDisplayId) {
         this.id = preparationDisplayId;
         this.env = env;
@@ -39,7 +40,6 @@ patch(PreparationDisplay.prototype, {
 
         // force refresh every 5 seconds
 
-        
         // setTimeout(function(){
         //     window.location.reload();
         // }, 5000);
diff --git a/custom_preparation_display/static/src/override/pos_preparation_display/components/order/order.xml b/custom_preparation_display/static/src/override/pos_preparation_display/components/order/order.xml
index 22e3d10..d4977b0 100644
--- a/custom_preparation_display/static/src/override/pos_preparation_display/components/order/order.xml
+++ b/custom_preparation_display/static/src/override/pos_preparation_display/components/order/order.xml
@@ -5,6 +5,7 @@
             <div class="o_pdis_table pe-1">
                 <t t-if="this.props.order.take_away">OUT </t>
                 <t t-elif="this.props.order.table_stand_number or (this.props.order.table and this.props.order.table.name)">T<t t-if="this.props.order.table_stand_number" t-esc="this.props.order.table_stand_number"/><t t-else="" t-esc="this.props.order.table.name"/> </t>
+                <!-- change the self order tracking number, default is 'IN'-->
                 <t t-else="">
                     T<t t-if="this.props.order.table.name" t-esc="this.props.order.table.name"/> </t> 
                 </t>