# Syncing Schema and Data

If you make any changes to your schema or data, such as adding new tables or fields, this will not appear immediately in Stacker. Run a manual schema sync directly in Stacker to see the changes.

## Run Schema Sync

Stacker automatically syncs the schema structure every **24 hours**, you can manually run a schema sync as an admin whenever you need in order to see changes reflected straight away.

1. Click   **App Settings**
2. In Data Sources click **Schema** button

![schema.gif](https://support.stackerhq.com/hc/article_attachments/7805974656915/schema.gif)

 

**We do not automatically enable new fields or tables in your app** in order to ensure you are in control of the data your users can access. In order to reveal new fields and tables to your users, you will have to [enable them](https://support.stackerhq.com/hc/en-us/articles/4409598246675). The only structural changes that will be automatically visible to users are the removal of fields or tables.

## Run Data sync

When you or your users make changes to your data in Stacker, those changes are reflected immediately in your data source.

If you are using Airtable as a data source and have [upgraded your connection,](https://docs.stackerhq.com/stacker-classic/data/third-party-integrations/airtable/upgrading-airtable-data-connections) you will see your records from Airtable in[ Real Time.](https://docs.stackerhq.com/stacker-classic/data/third-party-integrations/airtable/real-time-airtable-sync) 

1. Click   **App Settings**
2. In Data Sources click **Data** button

![data.gif](https://support.stackerhq.com/hc/article_attachments/7806507306771/data.gif)

You can also run a Schema and Data sync in  **Manage fields and data.**