You can update Web Part properties to make changes to the appearance, layout and advanced features of an App Web Part. Changes you make to the Web Part properties are visible to anyone viewing the published Web Part Page.

To edit App Web Part properties, click the down arrow in the right corner of the App Web Part title bar and select Edit Web Part.

This puts the page in Edit Mode and opens the Web Part Properties pane for this app:

In addition to the standard Web Part properties, app Web Parts have two additional categories of properties that you can update: JackBe UI Settings and MashZone NextGen App. Use these properties to:

See also Update Mashup or App Input Parameters.