> ## Documentation Index > Fetch the complete documentation index at: https://docs.denari.com/llms.txt > Use this file to discover all available pages before exploring further. # Binder settings > Period, contributors, exports, and locking a finished binder. The **Settings** tab is where a binder's own configuration lives, and where several things people hunt for on other tabs actually are. The binder Settings tab showing period duration, period end, client entity type, basis, and the reviewer and preparer lists. ## What's here * **Period**: change the period end and duration * **Contributors**: add or remove reviewers and preparers * **Trial balance**: update or re-import it. See [The trial balance](/papers/trial-balance) * **Exports**: every export the binder can produce. See [Export a binder](/papers/export-binder) * **Lock / delete** ## Contributors Reviewers and preparers are assigned here, and the roles are load-bearing: only a **preparer** can [submit for review](/papers/binder-reviews), and only a **reviewer** can approve or reject. If you can't submit or approve, this is usually why. Add yourself here first. ## Lock or delete a binder | Action | Who | | - | - | | **Delete** | Admins | | **Lock** | Admins, and reviewers assigned to the binder | | **Unlock** | Admins only | Lock a binder once it's complete so its numbers can't drift after sign-off. ### What locking stops * Reconciling and un-reconciling lines * Creating or editing journal entries * Ignoring and un-ignoring lines * Editing the chart of accounts * The Settings page, apart from exports * Editing `.xlsx` files through SharePoint * Editing documents ### What still works * Viewing documents, the trial balance, and journal entries * Exporting PDFs and CSVs * Downloading documents A locked binder is fully readable and fully exportable. It just can't change. Lock as soon as review completes rather than at the end of the season. The value is in knowing an exported figure still matches the binder it came from. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.