> For the complete documentation index, see [llms.txt](https://docs.stackerhq.com/stacker-classic/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stackerhq.com/stacker-classic/users/previewing-an-app-as-a-user-for-testing.md).

# Previewing an app as a user for testing

Stacker allows you to preview your app as a specific user. You can check that the right permissions are in place and you're happy with the appearance of your app for users.

## Entering Preview Mode

Click **Preview as** in your admin panel

![Screenshot\_2022-06-06\_at\_14.48.44.png](https://support.stackerhq.com/hc/article_attachments/6755319054611/Screenshot_2022-06-06_at_14.48.44.png)

\
Choose which user you want to preview as by clicking the down arrow next to the user name on the top left.

![Screenshot\_2022-06-06\_at\_14.49.57.png](https://support.stackerhq.com/hc/article_attachments/6755399773075/Screenshot_2022-06-06_at_14.49.57.png)

\
Click the blue **Exit preview** button to exit preview mode.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.stackerhq.com/stacker-classic/users/previewing-an-app-as-a-user-for-testing.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.