This will walk through how to split a sales order into multiple shipping orders:
1. Navigate to Sales orders -> Paid ready to ship
2. Click the box icon above the red x on the far right of your screen
3. This will bring up a create shipping order screen. Here is where you can choose how many of the product you would like to ship.
4. Enter the quantity on the Quantity To Ship column.
5. Click continue. This will create a shipping order based on the quantities you have entered.
6. Navigate back to sales orders -> paid ready to ship to create a shipping order for the remaining products within the sales order.