The Fixed background option lets you set a fixed background while letting the forefront screen continue to scroll vertically (parallax-type scrolling).
To set your fixed background for all the screens in the prototype:
- Navigate to the appropriate prototype and open a screen.
- At the bottom-right of the browser window, click the ••• (More) menu icon.
- Under the Background Image dropdown, click Upload New.
- In the Mode dropdown menu, select Fixed.
You can also set a fixed background for an individual screen by clicking the button Custom Appearance at the top-left corner of a screen in Build mode and selecting the option Fixed in the Mode dropdown menu in that modal.