To create a COD/Prepaid order please follow the following steps
Step 1: Click on Orders

Step 2: Click on the Create New Order button

Step 3: Fill out all the order details but while doing so please select COD/Prepaid from the Payment dropdown

Step 4: Click on Submit to place your order

You will see a message on the top right corner saying "Order Added Successfully"
This means that your order has been placed with your selected payment mode.