When you have a customer who orders from you on a regular basis, you may wish to create a manual order for that customer. Luckily, this is an easy process in ShipStation.
First, click Customers, and search for the person or company using the search field in the sidebar on the on the left or browse through your customer records.
Then, once you have found the customer, check the box that corresponds to their record, click the New Manual Order button.
Here, you can fill out the order with line items and other order details. When you're done, you'll have three choices: Save Order, Save and Create Another, Save and Ship!.
After you've chosen one of the save options, any orders you created will be treated just like any other within ShipStation.