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

# Cell Tags

> Manage custom tags for organizing notebook cells.

Cell tags help you organize notebook cells by purpose or category. Create tags like "preprocessing", "visualization", or "model-v2" to categorize your work.

## Viewing cell tags

The Cell Tags section in Settings lists all custom tags you've created:

* Tag name
* Description (optional)
* Delete option

Cell tags are shared across all notebooks in Qualia.

## Creating cell tags

Create cell tags directly from notebooks:

1. Select a cell in your notebook
2. Click the tag icon in the cell toolbar
3. Type a new tag name and press Enter

New tags automatically appear in Settings for management.

## Editing cell tags

Cell tags can be edited in Settings:

* Update the description
* The tag name cannot be changed after creation

## Deleting cell tags

When you delete a tag:

1. A confirmation dialog appears
2. The tag is removed from **all cells** that use it across all notebooks
3. This cannot be undone

<Warning>
  Deleting a tag removes it from every cell in every notebook. Make sure you want to remove all uses before confirming.
</Warning>

## Built-in cell tags

Some cell tags are built-in and cannot be deleted. These are used by Qualia for internal organization.

## Using cell tags

Cell tags appear in the cell toolbar when you click the tag icon. Benefits of tagging:

* Filter cells by tag in large notebooks
* Track which cells belong to different experiments
* Organize preprocessing, training, and evaluation phases