> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dune.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Version History
> Queries have a version history, where you can compare and revert to previous query versions.
All queries come with version history, where you can compare and revert to previous query versions seamlessly. **You can access version history from the query editor toolbar.**
**History Length**
Everyone gets 30 days by default, you can upgrade your plan for longer history access.
### Saving and Managing Versions
A new version is created each time you save or run your query. The first time you save a query — whether it is forked or freshly created — an initial version is committed to the history. If you've forked a query, the version history starts fresh; you won't have access to the original query's edit history.
Each subsequent run saves a new version automatically. If you leave the page without saving or running, any unsaved changes will be lost. You can also edit the metadata of any saved version — such as adding a title or description — to make it easier to identify later.
### Comparing and Reverting Versions
You can compare diffs between any two versions to see exactly what changed, and revert to a previous version if needed. **The reverted query is saved as a new version in the history**, so you never lose your current work.