CONFIRE SHOWTIME DESIGNER allows you to create any number of Master Layouts. Thus you can define any number of target resolutions. And as the number of Showcases isn't limited either, a single SHOWTIME project can manage content for multiple public displays.
An example for a Layout Structure:
Master Layout 1 (1920 x 1080, Landscape) -- Layout 1 -- Layout 2 -- Layout 3 Master Layout 2 (1920 x 1080, Portrait) -- Layout 1 -- Layout 2 -- Layout 3
The project can therefore define two different Showcases. A Showcase for a full HD resolution in Landscape and a Showcase for a full HD resolution in portrait. The resources used are the same but the corresponding graphical layout elements are arranged differently.