About Screen Masks
Screen Masks allow to easily configure and manage the graphical properties of Screens, providing a consistent style to all Screens or a group of them. A Mask can also act as a wireframe for Screens, defining areas and spacing for Objects to be added during the Screen design process.
The style and Objects of a Mask are inherited by all Screens associated with that Mask: when you update a Mask, all associated Screens immediately reflect any change.
A Mask can contain images (for example, the company logo), text labels (for heading and titles), buttons and menus (for navigation) and other interactive Objects. It can also be used for defining a background color and other common Screen properties.
Masks cannot contain Objects defined by a Layout, such as Data Views, Charts, Gauges and so on: those Objects won't be available when designing Masks.