> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.optis.me/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why doesn’t the product image change when I click a variant?

1. [OPTIS Color Swatch](/swatch)
2. [Variant Display](/swatch/variant-display)
3. [Common questions](/swatch/variant-display/common-questions)

# Why doesn’t the product image change when I click a variant?

Our app works **based on Shopify’s native variant configuration**. For the variant image to change correctly, your theme’s **variant picker must be enabled**.

#### How to check and enable it:

1. **Go to Online Store → Themes → Edit theme**

![Online Store Themes section with the Edit theme button](https://storage.crisp.chat/users/helpdesk/website/-/1/c/3/f/1c3f3f320cc12e00/6ab16c11-c313-4717-a857-578cac_5zusk5.png)

2. **Open the Product template**

![Product template selected in the theme editor](https://storage.crisp.chat/users/helpdesk/website/-/e/d/3/4/ed34167519161800/6762d28f-4cf6-4bc5-910e-9a3936_1x31bu2.png)

3. In the **Product information** section:

* Add the **theme’s Variant Picker**
* Add the **OPTIS app block** as well

![Adding the OPTIS app block to the product template](https://storage.crisp.chat/users/helpdesk/website/-/a/8/9/9/a899c5774a1a6800/6b019933-3512-41b6-9214-3851e4_qkwoao.png)

👉 **Important notes**:

* OPTIS **restyles and enhances Shopify variants** - it does **not** create a separate variant system.
* The theme’s variant picker **must remain enabled** for image switching to work properly.
* If you see **both the theme variants and OPTIS swatches showing at the same time**, this is usually a theme conflict. In that case, please **contact our support team** and we’ll help resolve it.

After enabling the variant picker, kindly double-check the product page. If the issue still persists, feel free to reach out - we’re happy to assist further.