Utility bar in Lightning apps
Key Takeaway
The utility bar holds Lightning components, called utilities, in a fixed footer of a Lightning app. A flow added to the utility bar is accessible from any page in that app.
The utility bar gives users of a Lightning app quick access to common productivity tools, such as Notes and Recent Items. Each tool in the bar is a utility: a Lightning component that opens in a docked panel. Admins add and configure the utilities for an app from the App Manager in Setup.
What the utility bar is
The utility bar is a specialized type of Lightning page that is available in Lightning Experience. A user opens a utility by clicking it in the bar. Some utilities support pop-out, which opens the utility in a new browser window instead of the docked panel.
The bar's "Default" alignment follows the user's language setting. For a left-to-right language like English, Default places the utility bar at the bottom of the left side of the screen, and "Mirrored" places it at the bottom of the right side.