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

# Knowledge base editing

> Edit knowledge base sources in the Bland dashboard, with side-by-side editors showing the original PDF, DOCX, or JSON next to the text your agent uses.

## Overview

You can edit the content of a knowledge base source directly in the Bland dashboard. Each source type opens in an editor suited to its format. Files that Bland converts to text, such as PDF, DOCX, and JSON, open in a side-by-side editor: the original uploaded file on the left, the extracted text you can edit on the right.

## Open a source

1. In the dashboard, select your agent, then select **Knowledge** in the sidebar.
2. Open the **Sources** tab and select the source you want to edit.

The editor that opens depends on the source's file type.

## Editors by source type

| Source type                        | Editor                                                                                                       |
| ---------------------------------- | ------------------------------------------------------------------------------------------------------------ |
| Plain text and Markdown            | Full-width code editor                                                                                       |
| PDF                                | Side-by-side: original PDF with zoom and page controls on the left, editable extracted Markdown on the right |
| DOCX                               | Side-by-side: original document preview on the left, editable extracted Markdown on the right                |
| JSON                               | Side-by-side: original JSON file on the left, editable converted Markdown on the right                       |
| CSV                                | Spreadsheet-style grid editor                                                                                |
| Web scrape                         | Editable list of source URLs                                                                                 |
| Integrations (Notion, Google Docs) | Read-only in Bland. Edit the document in the source app, then re-sync.                                       |

## The side-by-side editor

PDF, DOCX, and JSON sources always open in the split view. The left panel is a read-only preview of the original file you uploaded. The right panel is the extracted or converted Markdown, which is the text your agent searches when answering questions. Drag the divider between the panels to resize them.

A few notes:

* Older JSON sources that don't have a stored original file open in the standard full-width editor as raw JSON.
* If the original file preview fails to load, reload the preview from the panel. You can keep editing the text on the right either way.

## Saving changes

1. Select **Save**, or press **Cmd/Ctrl+S** in the editor. Bland opens a preview of your changes so you can step through each edit before committing.
2. Select **Save** in the preview header to commit.
3. For PDF, DOCX, and JSON sources, Bland asks you to confirm before saving. Your edits replace the extracted text, so it will no longer match the original source file.

After you save, Bland re-embeds the source so your agent uses the updated content. Source content must stay under 10 MB.

## Versions

Every save creates a new version of the source. Use the version selector on the source page to open a past version. Past versions are read-only, including in the side-by-side editors.