Fixed headers and footers are areas of your screen which remain static, while you scroll the rest of your screen. They're useful for things like action bars on Android or header bars on iOS, or a row of tabs along the top or the bottom of a screen.
How to set a fixed header and footer:
- Open Marvel Editor by clicking on any of your images
- Slide the 'fixed header' and 'fixed footer' bars, located on the left hand side of the image
- You can choose any length of header or footer for either one - the px indicator on the right hand side of the image, level with the bar, shows how many pixels are fixed