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# What's new in Sigma

> Sigma release notes for Apr 11, 2025: Authenticate secure embeds using JSON Web Tokens (JWTs), and more.

## Embeds

### Authenticate secure embeds using JSON Web Tokens (JWTs) (GA)

Sigma supports authenticating secure embeds using [JSON Web Tokens (JWTs)](https://jwt.io/). JWTs are compact, URL-safe tokens that can be digitally signed, ensuring that the data they contain is tamper-proof. Using JWT-signed URLs for your embeds offers several advantages, including offering a secure way to embed content that can be accessed by both external users and internal users.

The URL parameters `hide_menu` and `hide_folder_navigation` are now supported in secure embed URLs signed with JWTs.

For more information, see [Create an embed API with JSON web tokens](https://help.sigmacomputing.com/docs/create-an-embed-api-with-json-web-tokens).

## Performance

### Scheduled materialization bypass on Snowflake connections

When using materialization with a Snowflake connection, Sigma detects data updates in materialized elements in workbooks and data models. If the underlying data hasn't been updated since the last successful materialization, Sigma bypasses the scheduled materialization to reduce unnecessary compute time and costs.

For more information, see [Scheduled materialization bypass](https://help.sigmacomputing.com/docs/materialization#scheduled-materialization-bypass).

## Workbook elements

### Legend controls (GA)

Add the legend control element to your workbook to target multiple charts with one legend and align colors across charts. The legend control functions as an interactive legend, letting you filter and highlight corresponding data points in targeted charts. Any categories not represented in the list are collected as an extra category, "Others", which can be turned off.

For more details, see [Create and configure a legend control](https://help.sigmacomputing.com/docs/create-and-configure-a-legend-control).

## Workbook features

### Bulk clear controls in a tabbed container

Use the **Clear control** action to bulk clear all controls in a tabbed container element or a specific tab. When configuring the action, select the tabbed container element, then choose the **All tabs** option or select a specific tab that contains the controls you want the action to clear.

For more information, see [Clear one or more control values](https://help.sigmacomputing.com/docs/create-actions-that-manage-control-values#clear-one-or-more-control-values).

## Bug fix

* In a custom view of a workbook embed when `:responsive_height` is set to `true`, the lineage view now displays correctly without being truncated.