> ## Documentation Index
> Fetch the complete documentation index at: https://help.peernotes.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Sources: attach documents and web clippings in PeerNotes

> Sources are the raw material behind your thinking — documents, images, videos, and clipped web pages you attach to thoughts and notes in PeerNotes.

A **Source** is anything you're thinking *about*: a PDF report, an article you clipped from the web, an image, a video, a meeting document. Sources give your ideas context — every thought or note can point back to the material that sparked it, so you (and later, your teammates) always know where an idea came from.

## What you can add as a source

<CardGroup cols={2}>
  <Card title="Documents" icon="file-pdf">
    PDFs, Word documents, text and Markdown files, CSVs, and more. Upload them directly or attach them to a thought as you capture it.
  </Card>

  <Card title="Web pages" icon="globe">
    Clip articles and pages from your browser with the [PeerNotes extension](/guides/web-clipper). The page's content and URL are saved together.
  </Card>

  <Card title="Images" icon="image">
    Screenshots, diagrams, whiteboard photos — anything visual you want to keep alongside your thinking.
  </Card>

  <Card title="Videos" icon="video">
    Upload video files to reference recordings, talks, or demos in your notes.
  </Card>
</CardGroup>

## Add a source

There are three ways to get material into your sources library:

<Steps>
  <Step title="Upload from the Sources feed">
    Open **Sources** in the sidebar and upload a file. Give it a name, and PeerNotes detects whether it's a document, image, or video automatically.
  </Step>

  <Step title="Attach while capturing a thought">
    In the thought capture box, type or use the attach button. You can upload a new file, paste a link, or search your existing sources and attach one — without leaving the capture flow.
  </Step>

  <Step title="Clip from the web">
    Use the [browser extension](/guides/web-clipper) to save the page you're reading straight into your workspace, highlights included.
  </Step>
</Steps>

## Reading and taking notes on sources

Open any source from the Sources feed — or from a source chip on a thought — to read it in the built-in viewer. As you read, capture thoughts about it; each one stays linked to the source, building a trail from raw material to your own thinking.

<Tip>
  This is the heart of the PeerNotes reading workflow: **read a source, react in thoughts, compile thoughts into a note**. When your note cites its sources, teammates reviewing it can check the original material rather than taking your word for it.
</Tip>

## Sources and your team

Like thoughts, your sources are private raw material by default. What you share is the thinking you build on top of them — but when a shared note references a source, workspace members reading the note can open that source for context.

<Card title="Next: Topics" icon="tags" href="/core-concepts/topics">
  See how PeerNotes automatically organizes your thoughts, notes, and sources around the themes you actually think about.
</Card>