# Collaboration tab
Introducing the Document Editor user interface - Collaboration tab

The Collaboration tab allows to organize collaborative work on the document: share the file, select a co-editing mode, manage comments, track changes made by a reviewer, view all versions and revisions.

Using this tab, you can:

- specify sharing settings,
- switch between the Strict and Fast co-editing modes,
- add comments to the document,
- enable the Track Changes feature,
- choose the changes display mode,
- manage the suggested changes,
- open the Chat panel,
- track version history.