In the Order statuses tab, you can view, edit, delete, and create order statuses used to manage orders placed on your online shop and define the steps that suit the way you wish to work.
Go to backoffice >> orders >> order statuses.
The existing statsus will be shown, you can now edit, add or delete these

To create a new status, click Add new.

Status name: Eneter the name you want to call this status
Icon: If desired, upload a small icon
Color: Enter a highlight color for this status
A) Consider the associated order as validated
B) Allow customer to download and view PDF version of invoice
C) Send email to customer when order chnaged to this status
Template: Choose the template that applies to this stutas
Once you are happy with your inputs press save
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Tip: Be aware that the Tracking input field will only show up in your customer orders AFTER you set the order as “Shipped” status. (See orders), if you need to get around this until it is addressed ina future version of Prestshop (current version 1.1) do the following;
open the file tabs/adminorders.php
Arround 405 find:
if ($carrier->url AND $currentState->id == _PS_OS_SHIPPING_)
Change this to:
if ($carrier->url AND ($currentState->id == _PS_OS_PREPARATION_ || $currentState->id == _PS_OS_SHIPPING_))
Now
you should be able to enter the Trackingnumber when the order is set to status
"Preparation" and you can still edit the tracking number before shipping
and after shipping.
When the order is changed to status "Shipped" the tracking number will be send in the email to your customer.