Setting up a new Storyline project includes making basic decisions such as choosing a filename and the shape and resolution for your project slides. Our project will use 16:9 ‘HD’ slides as it is designed to be viewed full-screen. If you go on to create projects for mobile viewing or for viewing alongside other content, other resolutions or aspect ratios will be more appropriate.
You can view the latest updates to Storyline here:
https://articulate.com/support/article/Articulate-Storyline-360-Version-History