> For the complete documentation index, see [llms.txt](https://docs.p4warehouse.com/v2/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.p4warehouse.com/v2/receiving/system-configurations/data-entry.md).

# Data Entry

![](/files/NO2hdyDNI7PubGTyMMNs)

* **Po Number Prefix**: this is the prefix for Purchase Orders, PO- is a standard prefix.
* **Allow Custom Po Number**: this check box indicates whether a custom PO number could be entered during data entry.
* **Duplicate Sku Behavior**: Duplicate SKUs line behavior. There are three choices.
  1. Allow - allows duplicates.
  2. Prompt - will present a prompt warning of a duplicate.
  3. Prevent - will error on attempt to create a duplicate.
* **Packsize Entry Type**: data entry unit of measures (packs or eaches) for packsize control items.
* **Bulk Update Fields**: comma separated list of fields that are available for 'Apply Field(s)' function in Purchase order list.

{% hint style="info" %}
Notice: Click 'Save' to implement changes. 
{% endhint %}