[help-page] drop-shipping documentation

erpnext/docs/user/guides/selling/drop-shipping.md

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+**Drop shipping** is a supply chain management technique in which the retailer does not keep goods in stock. Instead they transfer customer orders and shipment details to either the manufacturer, another retailer, or a wholesaler, who then ships the goods directly to the customer
+
+In ERPNext, you can create a Drop Shipping by creating Purchase Order against Sales Order.
+
+> Selling > Documents > Sales Order > Purchase Order
+
+#### Setup on Item Master
+
+Set **_Delivered by Supplier (Drop Ship)_** and **_Default Supplier_** in Item Master.
+<img class="screenshot" alt="Setup Item Master" src="{{url_prefix}}/assets/img/selling/setup-drop-ship-on-item-master.png">
+
+#### Setup on Sales Order
+If Drop Shipping has set on Item master, it will automatically set **Supplier delivers to Customer** and **Supplier** on Salse Order Item.
+
+You can setup Drop Shipping, on Sales Order Item. Under **Drop Ship** section, set **Supplier delivers to Customer** and select **Supplier** agaist which Purchase Order will get created.
+<img class="screenshot" alt="Setup Drop Shipping on Sales Order Item" src="{{url_prefix}}/assets/img/selling/setup-drop-ship-on-sales-order-item.png">
+
+#### Create Purchase Order
+After submitting a Sales Order, create Puchase Order.<br> 
+<img class="screenshot" alt="Setup Drop Shipping on Sales Order Item" src="{{url_prefix}}/assets/img/selling/drop-ship-sales-order.png">
+
+From Sales Order, all items, having **Supplier delivers to Customer**  checked or **Supplier**(matching with supplier selected on For Supplier popup) mentioned, will get mapped onto Purchase Order. 
+
+It will automatically set Customer, Customer Address and Contact Person.
+
+After submitting Purchase Order, to update delivery status, use **Mark as Delivered** button on Purchase Order. It will update delivery percetage and delivered quantity on Sales Order.
+<img class="screenshot" alt="Purchase Order for Drop Shipping" src="{{url_prefix}}/assets/img/selling/drop-ship-purchase-order.png">
+
+<span style="color:#18B52D">**_Close_**</span>, is a new feature introduced on **Purchase Order** and **Sales Order**, to close or to mark fulfillment.
+<img class="screenshot" alt="Close Sales Order" src="{{url_prefix}}/assets/img/selling/close-sales-order.png">
+
+###Drop Shipping Print Format
+You can notify, Suppliers by sending a email after submitting Purchase Order by attaching Drop Shipping print format.
+<img class="screenshot" alt="Drop Dhip Print Format" src="{{url_prefix}}/assets/img/selling/drop-ship-print-format.png">

erpnext/docs/user/guides/selling/index.txt

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 quotation
 sales-order
+drop-shipping
 setup