
You can also view your page in different formats, refresh the canvas, or adjust the canvas size to fit your view. Use the buttons in the toolbar to cut ( ), copy ( ), and paste ( ) page content and to undo ( ), redo ( ), save, or activate your Lightning page. In an app context, the Pages list shows all active Lightning pages associated with the current app. If you’re editing an app, the header also shows the app name and contains an App Settings tab where you can configure the app’s options such as branding, navigation, and the utility bar. You can also return to Setup without saving or to view more help for the Lightning App Builder.

When you're working on a Lightning page, the header shows you its label, and contains a Pages list where you can see the last 10 pages that you modified.
