The Composition Builder application for macOS enables TV stations to easily create professional-looking realtime graphic templates for just:live and just:play.

Powerful Graphics Development

With the standalone Composition Builder application, you can create professionally looking realtime graphic templates for news, weather, stock exchange, sports, and other broadcast applications. These realtime graphics can directly be used in just:play and just:live.

Customize on Air

Customize your realtime graphics On Air or use external sources (XML, RSS, images, and text files) to manually or automatically update your graphics.

We love XML and XPath.

Out-of-the-box support for XML files, coupled with the powerful XPath query language, enables data extraction from local or networked files.

Sample Content Included

The Composition Builder application ships with a package of pre-designed templates that can be used and modified for free. Drop them into any graphics layer in just:play or just:live to play them out concurrently with any video clip.

Stop Frames for Dynamic Graphics

The powerful “stop-frame” functionality allows you to dynamically extend the duration of graphic templates while maintaining the individual duration of animations within the template.

Live Graphics Control

Changes to graphics and information sources can be easily made during playout and taken to the air in realtime, enabling fast turnaround on-air adaptations where needed.


The Composition Builder application is designed to enable the fast creation of your custom template compositions to extend your graphic template’s portfolio.

Native Integration

Realtime graphics created with the Composition Builder application are interpreted natively and rendered on the fly by ToolsOnAir’s playout engine, ensuring the realtime preview of graphic templates in either the just:play or just:live user interface.

Supported Resolutions


Solution Video Gallery

Please click on the Link to access the video(s) on YouTube directly.

Compatibility Matrix

System Requirements

  • Version 5.0: Apple macOS Monterey (latest), macOS Ventura (latest), macOS Sonoma (latest) are recommended. Runs natively on qualified Intel- or Apple silicon hardware (Apple silicon is recommended).
  • 16 GB of RAM recommended.
  • AMD or Apple silicon graphics card (integrated or discrete).
  • A screen resolution of at least 1920×1080.
  • For detailed system requirements, please consult the online user manual or contact us

Free Download / Infos

  • A trial version of our latest Composition Builder v.5.0.0 is included in the latest release version of just:live/just:play installer and can be downloaded by clicking on the “Download” button below. Composition Builder is a Site Licence and is now part of any purchased Realtime Basic FX Layer .
  • Make sure to test the final composition on a system that is equal to the system which is used to run the Just Out engine. Depending on the CPU, GPU, and storage system used for playout, you will be able to play more or less complex compositions.

Further Documentation: