> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
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# How can I test out the App on a backup theme before taking it to the production theme?

Sometimes you may want to test out the App on a backup theme before taking it live on the production theme. **Please follow these steps to test this App out on the backup theme:**

**Step 1:** Open the **Shopify** **Admin**, and under **Sales channels,** 
**Step 2:** Click " **Online** **Store**". 
**Step 3:** Click on the " **Themes**" menu. 
**Step 4:** Find your backup theme in the list, and click " **Customize**".

![](https://storage.crisp.chat/users/helpdesk/website/303637f65042b000/image_fecxs4.png)

**Step 5: **In the Customize theme screen, click " **App embeds**" on the left menu:

![](https://storage.crisp.chat/users/helpdesk/website/303637f65042b000/image_14588qs.png)

**Step 3: Enable** **App** **embed** for our **PD: Back in stock App**, and click " **Save**" on the top right. 
![](https://storage.crisp.chat/users/helpdesk/website/303637f65042b000/image_1ey0ve3.png)

**Step 6: ** Go back to the " **Themes**" menu, Click on **Three Dots **beside publish button
**Step 7:** Use " **Preview** **mode**" to test out the Notify me button in action, a preview version of your back theme will open in a ** new tab.**
![](https://storage.crisp.chat/users/helpdesk/website/303637f65042b000/image_142yyv8.png)

**Navigate to a sold out product page, and you should see the "Notify me" button here**. Go back to the PD: Back in stock App inside the Shopify Admin to customize the button or to get help in case you don't see the button. 

*Once you've tested everything thoroughly, you can either publish your backup theme or you can enable App embed on your main theme to enable the App on your Production store.*