Screen Size
The screen size button allows you to enter the width and height of the display you are designing the layout for. Although this is not a mandatory requirement, it can be helpful to define it if you might want to display the layout on a different screen.
When SDC boots up it checks the size of the display it is connected to, and compares it to the width and height defined in the pageset. If the latter is larger, the page is scaled down so that you can see it all.
SDC does not automatically upscale the page if the display resolution is larger than the pageset’s defined width and height.