> For the complete documentation index, see [llms.txt](https://docs.knowbase.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.knowbase.ai/chat/chat-all.md).

# Chat All — Library Search

## What is Chat All?

The **Chat** tab searches across **all your uploaded files** at once. Instead of opening one file at a time, you can ask a question and Knowbase finds the answer from whichever files are most relevant.

## How to use it

1. Click the **Chat** tab in the top navigation
2. Type your question
3. Knowbase searches your entire library and returns an answer with citations from multiple files

## Narrowing the search

You can control what gets searched:

* **Drop files** into the chat input to search only those specific files
* **Toggle Library** on/off using the library icon in the input bar
* The **context label** above the input shows what's currently being searched

{% hint style="info" %}
**Example:** Drop two quarterly reports into the chat, then ask "Compare Q1 and Q2 performance." Knowbase will only search those two files.
{% endhint %}

## Chat All vs File Chat

| Feature          | Chat All               | File Chat              |
| ---------------- | ---------------------- | ---------------------- |
| Searches         | Entire library         | Single file            |
| Opens from       | Chat tab               | Library > click file   |
| Best for         | Cross-document queries | Deep-dive into one doc |
| File attachments | Yes                    | No                     |