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Unified Tagging

One set of colored tags that spans every Block type: docs, email, tasks, chats, and calls.

Starter documentation. Features and account details may differ from this deployment.

A tag is a property shared across your workspace, so the same tags work on every Block type. Tag an email marketing and a task marketing and it's the same marketing.

Tags are for organizing your work by project, team, or area, like marketing, hiring, or q3-launch. They aren't for tracking status. Status, priority, and assignees are properties that describe a single item, while a tag is a property that ties related items together across the whole workspace.

Creating and applying tags

  • Type # in a document and pick a tag, or create one.
  • Right-click a Block and choose Add tag.
  • In the side panel, click Add tags.

Personal and team tags

When you create a tag you choose its scope:

  • Personal — only you see it. Anyone can create personal tags.
  • Team — shared with everyone on your team. Creating a team tag requires being on a team.

Renaming or recoloring a tag keeps its identity, so the change flows to every item already carrying it. Deleting a tag is destructive and it will be removed from everything at once and can't be undone.

In any Block, go to Filter → Tags to show only the items carrying a tag. To filter across your entire workspace at once, use the same Tags chip in the filter menu of search. Select two or more tags and a match-mode toggle appears:

  • Any — items that have any of the selected tags (the default)
  • All — items that have every selected tag, for example everything tagged both marketing and q3-launch

Clicking a tag pill anywhere jumps straight to everything else carrying it.

Managing your tags

Curate the full set from Settings → Tags, which lists your Personal and Team tags with edit and delete actions and a New tag button. It's the place to rename, recolor, or clean up tags without hunting for an item that uses them.

Tags are not email labels. Gmail labels, and the folders on an Outlook mailbox, still belong to that account and still drive inbox actions like archive and star. Mosaic tags are a separate, cross-workspace layer that sits on top — an email thread can carry both.

Tagging with agents

Tell your AI client (Claude Code, Cursor) connected to the MCP server "tag this thread marketing" or "make a q3-launch tag and add it to these tasks," and it handles the rest without you leaving your editor.

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