When your customer logs into your website they will be able to see their order history. They also see the status of their order, along with items ordered, date ordered, etc.
You can view orders by going to 'Customers>Orders':
Orders are listed in date order, with the most recent at the top of the list. To edit an order, simply click the 'Edit' link next to the order:
When you have processed and dispatched an order, you should change the status so that it no longer appears in your Administration Control Panel (default page when you log into the admin section). When you maintain the correct status your customer will benefit from this too, as they are able to see this when they log into your website.
Change the status as below, then click 'Edit Order' to save your changes:

Below is an outline of the various order status and what they mean:
You can print an invoice / packing slip by clicking 'Pring Packing Slip' at the top of the order page. This invoice has your logo and address details etc.

Please note that Internet Explorer prints the page location and date etc by default. To remove these items so that you have a neater invoice, go to the page setup in Internet Explorer and remove the settings in the header and footer fields:
