# Collaboration

> Real-time multiplayer editing — live presence, edits that sync as they happen, per-user undo, and named version history you can restore.

*[View this page in the Flax docs](https://flax-analytics.com/docs/sheets/collaboration)*

Sheets are multiplayer. Several people can open the same workbook and edit it at
once, with changes syncing live and each person's presence visible. This page
explains how collaboration works and how to use version history. The model is
described in ADR-0047 (real-time sheet collaboration).

## Live editing and presence

When you open a shared sheet, Flax subscribes you to a live stream of the workbook.
Your edits are sent as small operations and fan out to everyone else immediately;
theirs arrive the same way. You see collaborators as coloured presence markers
showing who is on which tab and what they have selected.

Because a spreadsheet is a keyed map of cells rather than one text buffer, edits to
different cells never conflict. When two people edit the *same* cell, the last write
to arrive at the server wins, so everyone converges on the same state.

> [!NOTE]
> Editing requires edit access to the sheet. If you have view-only access you can
> open and follow along, but your edits are rejected.

## Per-user undo

Undo (**⌘Z**) rolls back your own most recent change, even in a busy shared sheet —
it will not reach across and revert what a collaborator did. See
[Editing](/docs/sheets/editing) for the full set of editing shortcuts.

## Autosave and drafts

Edits persist automatically: the live session is the working copy, and Flax writes
it back to storage shortly after activity settles or when the last collaborator
leaves. A local draft is kept in your browser as an offline fallback.

## Version history

Beyond autosave, you can capture named checkpoints:

- **Save** creates a named version and flushes the current state.
- **History** lists past versions, newest first, with who saved each one.
- **Restore** rewrites the sheet's content from a chosen version.

Restoring changes content only, and the action is recorded in the
[audit log](/docs/administration/audit-log).

## Sharing

Who can view or edit a sheet is controlled by its visibility (private, team, or
organization) and the usual permission model. See
[Sharing and permissions](/docs/administration/sharing-and-permissions).

## Next steps

- [Editing](/docs/sheets/editing)
- [Workbooks and tabs](/docs/sheets/workbooks-and-tabs)
- [Sharing and permissions](/docs/administration/sharing-and-permissions)