> For the complete documentation index, see [llms.txt](https://nextsky.gitbook.io/purity-theme/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nextsky.gitbook.io/purity-theme/theme-installation/create-required-metafields/metaobjects/external-affiliate.md).
# External/Affiliate
{% hint style="success" %}
**Step Create Metaobjects**
1. Login to your Shopify store, click to **Settings**
2. Click to **Custom data -->** **Metaobjects** and Click **Add definition**
3. Add metaobject definition with 2 fields as bellow:
**-** Name: **External/Affiliate**
\- Field 1:
\* Name: **Button text**
\* Type: **Single line text - One value**
\- Field 2:
\* Name: **External link**
\* Type: **Single line text - One value**
{% endhint %}
{% hint style="success" %}
**Step Create Metafields**
1. Back to **Custom data -> Metafields -> Products**
2. Add a metafield as bellow:
\- Name: **External/Affiliate**
\- Type: **Mixed reference**
\- Validation: **External/Affiliate**
\- Namespace and key: **custom.external\_affiliate**
3. Setup metafield for a product and you can see the result.
{% endhint %}
**In product:**
* Add new entry:
\
**Result:** Auto change to External/Affiliate button
