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

# Add files, folders, and media

> Use drag and drop context for documents, images, audio, and code

Use this page to quickly ground Alter with the files and folders that matter for your task.

## Add context from Finder or apps

You can add content by dragging files or folders to the notch or The Hub. You can also use **Right click > Add to Alter**.

## Supported content

<CardGroup cols={2}>
  <Card title="Documents" icon="file-text">
    `.xlsx`, `.docx`, `.pdf`, `.txt`, `.md`, `.org`, `.rtf`
  </Card>

  <Card title="Images" icon="image">
    `.jpg`, `.png`, `.heic`, `.gif`, `.tiff`, `.svg`
  </Card>

  <Card title="Web content" icon="globe">
    `.html`, URLs, and dragged text
  </Card>

  <Card title="Email" icon="mail">
    `.eml` and Apple Mail messages
  </Card>

  <Card title="Audio" icon="music">
    `.mp3`, `.wav`, `.m4a`, `.aac`, `.flac`
  </Card>

  <Card title="Code" icon="code">
    Source files, config files, and scripts
  </Card>
</CardGroup>

<Note>
  Alter supports directory drops, OCR for images and PDFs, and automatic text encoding detection.
</Note>

## Audio and video transcription

When you add audio or video, Alter starts transcription automatically.

<Steps>
  <Step title="Drop one or more files">
    Drag media files to the notch or The Hub.
  </Step>

  <Step title="Wait for processing">
    Transcription starts automatically.
  </Step>

  <Step title="Ask targeted questions">
    Try: "Summarize key decisions" or "List action items by owner."
  </Step>
</Steps>

<Warning>
  For image analysis, use a model with vision capability.
</Warning>

## Related pages

* [Use current app and Follow Mode](/getting-started/use-current-app-and-follow-mode)
* [Use workspaces for bigger tasks](/getting-started/workspaces-basics)
* [Capture voice and meetings](/getting-started/capture-voice-and-meetings)