# Expressions

Source: https://help.zira.us/docs/data-sources/expressions
Summary: Use the Expressions tab to review expression-based logic for the current data source and continue to the full expressions guide when needed.
Updated: 2026-04-03

Use the **Expressions** tab when the data source uses expression-based Vision logic.

This tab is helpful when you want to review the expressions already connected to the data source and continue into deeper formula work when needed.

## Navigation

Open a supported Vision data source first, then click **Expressions**.

Use this tab when the expression work belongs to one specific data source.

## Open the Expressions tab

1. Open a supported Vision data source.
2. Click **Expressions**.
3. Review the expressions shown for that data source.

## What you can do here

Use this tab to:

- review the expressions connected to the data source
- open or adjust the expression work you need
- continue into deeper formula work when the setup becomes more detailed

If you only need to check or update expressions for one device, this tab is the right place to start.

## Read next

- [Expressions and Validation](/docs/data-sources/create-and-edit/expressions-and-validation) - Deeper guide to formulas and validation logic.