> For the complete documentation index, see [llms.txt](https://docs.p4.software/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.p4.software/p4warehouse-english/setup/system-configuration/reason-codes-1.md).

# Reason Codes

P4 Warehouse

This configuration page features Adjust In, Adjust Out, Unpick, Customer Return and Vendor Return. Within each field one can enter a comma-separated list of reason codes for each field. After modifying any entry, select the “Save” button to the lower right.

{% hint style="info" %}
These reason codes will be displayed on the mobile device when adjusting product quantities.
{% endhint %}

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