# Header

Header contains general information about pick ticket. Users can edit 'Po number', 'Reference' and create custom picking instructions and comments.

![](/files/1FbhalQoudx0RlnyLFZo)

'Pick ticket Number', 'Client', 'Customer', and 'Warehouse' are set during initial pick ticket creation and cannot be changed from this window.

Pick ticket state will automatically change following the fulfilment process.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.p4warehouse.com/v2/fulfillment/pick-tickets/new-pick-ticket/header.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.